Can you solve the birthday cake riddle? – Marie Brodsky

Practice more problem-solving at https://brilliant.org/TedEd

Your friend’s birthday is tomorrow, and he’s turning… well… you’ve forgotten. A ginormous cake has been prepared and your job is to sculpt his age as the chocolate centerpiece. The birthday boy is a giant, and you’re afraid that if your forgetfulness becomes known, you’ll become part of the feast. Can you figure out your friend’s age before the party? Marie Brodsky shows how.

Lesson by Marie Brodsky, directed by Igor Coric, Artrake Studio.

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How To Build The Universe in a Computer

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We routinely simulate the universe on all of its scales, from planets to large fractions of the cosmos. Today we’re going to see how it’s possible to build a universe in a computer – and see whether there’s a limit to what we can simulate.

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The negative impacts of loneliness | Indira Subramanian | TEDxRiverOaks

Neurologist, Dr. Indira Subramanian has spent years treating people with Parkinson’s Disease. Influenced by Victor Frankl, her passion led her to discovering the “secret sauce” that helps patients do well. Her TEDx discusses the negative impacts of loneliness and how a more holistic concept of health can improve health outcomes for patients and others. Dr. Indu Subramanian received her medical degree from the University of Toronto, Canada and did her neurology residency and Movement Disorders fellowship training at UCLA. She stayed on at UCLA and is now a Clinical Professor of Neurology. She established the movement disorder clinic at the West Los Angeles Veterans Administration and has assumed the position of the Director of the South West PADRECC (Parkinson Disease Research, Education and Clinical Care) Center of Excellence in Parkinson Disease since 2015. She has a strong interest in integrative medicine with a special interest in Yoga and Mindfulness. She underwent a 200 hour yoga teacher training and studied mindfulness. She is designing a yoga teacher training program for yoga instructors who are interested in working with PD patients. Dr. Subramanian recently got board certified in Integrative medicine. She is also passionate about palliative care.
https://www.nytimes.com/2021/04/28/health/social-medicine-programs.html This talk was given at a TEDx event using the TED conference format but independently organized by a local community. Learn more at https://www.ted.com/tedx

Karoli Hindriks: Why the passport needs an upgrade | TED

It’s time to give paper passports a digital upgrade, says entrepreneur Karoli Hindriks. Looking to Estonia’s technology-driven government for inspiration, she envisions a world where immigration is no longer hindered by bureaucracy and needless repetition. Travel with her to a future beyond borders where universal digital passports replace paper ones — and where outdated systems stop wasting our time and money.

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The Bees That Eat Corpses

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Bees are quite beneficial little critters: pollinating flowers, making honey, and also…helping corpses decompose.

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Sources:
https://doi.org/10.1128/mBio.02317-21
https://arstechnica.com/science/2021/11/carnivorous-vulture-bees-have-acidic-microbiomes-to-better-digest-their-carrion/
https://doi.org/10.1038/s41598-017-15581-5

Images:
https://www.istockphoto.com/photo/super-cute-honey-bee-sitting-on-a-leaf-gm1218469781-356053219
https://www.storyblocks.com/video/stock/swarm-of-bees-near-a-beehive-4ofmzajtgijutj8eo
https://www.istockphoto.com/photo/black-stingless-bee-gm1311170789-400352960
Stingless Bee - Trigona species, possibly silvestriana or corvina, Septimo Paraiso, Mindo, Ecuador
https://commons.wikimedia.org/wiki/File:Weiselzellen_68a.jpg
https://www.nature.com/articles/s41598-017-15581-5
https://www.istockphoto.com/photo/adult-stingless-bee-gm1348172090-425457789
https://www.istockphoto.com/photo/eastern-yellowjacket-with-food-gm637084120-113431469


https://www.istockphoto.com/photo/bees-gm91076298-2920909
https://www.istockphoto.com/photo/stingless-bee-gm1092376262-293091390

Food and its forgotten identity | Akash Muralidharan | TEDxNITTrichy

Food is a basic necessity, that also makes for a repository of culture, history and a powerful tool to bring about change. Having tackled issues such as climate change and loss of diversity, Akash demonstrates the competence that this relatively new branch of design possesses, with projects such as “Cook and See” exploring indigenous vegetables and “New National Dish – UAE” discussing the effects of diversity. Food is ever-evolving, dynamic and cosmopolitan- yet, it plays a crucial role in defining the identity of a region and its people. This talk brings the promise of a new perspective, and food for thought, quite literally.
Akash Muralidharan is a food designer, using new means to deliver powerful messages to his audience. He strongly believes that innovation in the 21st century, combined with out-of-the-box creativity, can make for a potent tool. Even more so with food, something so commonplace, yet associated with significant connotations of identity and emotion. This talk was given at a TEDx event using the TED conference format but independently organized by a local community. Learn more at https://www.ted.com/tedx

Do what you love, but make sure that you love it | Ahmed Haitham | TEDxBaghdad

Ahmed takes us through his life experiences that was full of challenges to show us the importance of doing what you really love to do. Ahmed Haitham
Iraqi, born in 1992
Passionate about creating digital entertainment content on social networks
I graduated from the University of Baghdad / Business Administration / 2015.
Worked in the media field for more than 10 years as director, video editor and writer.
The maker of the program (Jekmja) that publishes on social networking sites. This talk was given at a TEDx event using the TED conference format but independently organized by a local community. Learn more at https://www.ted.com/tedx

11 Amazing Historical Coincidences

The amazing coincidences in this episode of The List Show are drawn from the worlds of astronomy, politics, literature, and more. We’ve got well-known historical coincidences like the day John Adams and Thomas Jefferson passed away, along with some lesser-known (or less-considered) coincidences.

You’ll learn why dinosaurs didn’t enjoy total solar eclipses and find out that Galileo had an idiosyncratic (and let’s just say it, kind of annoying) way of communicating with his science buddies.

In case you forgot, The List Show is a trivia-tastic, fact-filled show for curious people. Subscribe here for new Mental Floss episodes every Wednesday: https://www.youtube.com/channel/UCpZ5qUqpW4hW4zdfuBxMSJA?sub_confirmation=1

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Image Credits:

Wikimedia Commons
Public Domain

Cap Trafalgar (Willy Stöwer)
Battle (Charles Dixon)
Carmania (MaritimeDigital Archive)
Jessop (HefePine23)
Olympic (LOC)
Hawke Olympic (Pmcyclist)
Britanic (Allan C. Green)
A-boms (U.S. Dept. of Energy)
Nagasaki (U.S. Marines)
Pym title page (Carl savich)
Boat damage (A. D. McCormick)
Mignonette (Tom Dudley)
Shakespeare (National Portrait Gallery)
King James Bible (Church of England)
Johnson (National Portrait Gallery)
Salinger (Blz 249)
Robert Lincoln (LOC)
Lincoln assassination (Heritage Auctions)
Garfield assassination (Mdd4696)
Garfield treatment (Sherurcij
Pan-American Expo (LOC)
McKinley (T. Dart Walker)
Wilhelm II (Imperial War Museums)
Solar eclipse (NASA)
Bailey (The Royal Astronomical Society)
Umberto (Franzy89)

CC 3.0
Kristallnacht (German Federal Archives)

CC 4.0
Britannic sink (Zm05gamer)
Bailey’s Beads (Tomruen)

Getty Images
Battleship (mechanick)
Hearts (photosynthesis)
Titanic (Central Press)
Underwater Explosion (ChristianThielNet)
Poe (Hulton Archive)
Edwin Booth (Napoleon Sarony)John Wilkes Booth (Apic)
Adams and Jefferson (Hulton Archive)
Eclipse2 (EyesWideOpen)
Eclipse3 (TPG)
Eclipse4 (Jamie Squire)
Galileo (Hulton Archive)
Saturn (Print Collector)
Kepler (Hulton Archive)
Swift (Hulton Archive)Headache (Phynart Studio)
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Jefferson (Print Collector)
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WW1 catalyst (Imagno)
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Twin adults (Newton Daly)
Moon earth (NASA)

Music:
“A Thousand Black Crows” (Isobel Raven/EMI)
List Show Opening and Closing Themes by Jason Weidner

Rebecca Galemba: How employers steal from workers — and get away with it | TED

When you work, you expect to be paid for it. Except, for millions of Americans employed across a range of industries like restaurants and construction, that’s not always the case. Anthropologist Rebecca Galemba explores the multibillion-dollar problem of wage theft and how employers get away with it, highlighting the changes needed for them to pay up — and fairly.

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This Exotic State of Light Acts Like a ‘Liquid’

Recently, researchers found that under the right conditions, light can behave like a liquid that flows in unison. That’s right — liquid light.
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Light has been a favorite subject of study since pretty much forever and it still has more amazing hidden properties waiting to be discovered. Recently researchers found that under the right conditions, light can behave like a liquid with particles that flow in unison. That’s right—liquid light. Well, that’s not quite right. “Liquid” is a useful analogy…but it implies the light is in a liquid state, when really it’s in a more exotic state of matter, namely a Bose-Einstein condensate, or BEC.

Sometimes called the 5th state of matter, after solids, liquids, gasses, and plasma, a BEC is created when a group of particles acts as one giant superparticle. This can be done using entire atoms like rubidium and potassium cooled to near absolute zero.

Like photons, atoms behave like both waves and particles, and as they cool to extreme temperatures they lose momentum and their wavelengths blur together. Pioneering Indian physicist Satyendra Nath Bose and Albert Einstein predicted they could exist nearly a century ago. Because they require such low temperatures, Einstein thought it would be impossible to actually observe one. Turns out the impossible became possible in 1995, when the first Bose-Einstein condensate was created using roughly 2,000 rubidium atoms. A different technique for creating Bose-Einstein condensates out of light was discovered in 2010, and interestingly, it involves much more reasonable temperatures. When cooled, photons have a tendency to vanish into the walls of whatever is containing them.

#seeker #science #elements #liguidlight #photons

Read More:

‘Liquid’ light shows social behaviour
https://phys.org/news/2021-10-liquid-social-behaviour.html
“Jan Klärs and his team found that the liquid decides for itself which path to take by adjusting its frequency of oscillation. In this case, the photons try to stay together by choosing the path that leads to the lowest losses—the channel with the closed end.”

The first ever photograph of light as both a particle and wave
https://actu.epfl.ch/news/the-first-ever-photograph-of-light-as-both-a-parti/
“Since the days of Einstein, scientists have been trying to directly observe both of these aspects of light at the same time. Now, scientists at EPFL have succeeded in capturing the first-ever snapshot of this dual behavior.”

5 Things Every Human Should Know About Light
https://www.wired.com/2015/02/5-things-every-human-know-light/
“What if you are in a place with absolutely no source of light?… One of the very common answers is that you will see everything as black – at first. These humans will also say that after some time your eyes will adjust and then you WILL see something. The correct answer is that you will just see black – forever.”
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Seeker empowers the curious to understand the science shaping our world. We tell award-winning stories about the natural forces and groundbreaking innovations that impact our lives, our planet, and our universe.

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What Does a White Lab Coat Have to Do With Online Fraud? [Advertiser Content From Zelle®]

Have you heard of the lab coat effect? It’s when humans are more likely to trust someone they believe is an authority figure. Think: doctors, tax and debt collectors, maintenance workers, utility company reps, and more.

Unfortunately, fraudsters exploit this phenomenon to prey on our trust and potentially trick us into buying faulty products, paying fake bills, or sending money to unverified sources. One of the easiest ways to avoid falling victim to the lab coat effect is to pause, step back, and verify the information of the person or group asking for money.

Why the next generation of interfaces will be human | Marc Teyssier | TEDxVienna

We are surrounded by devices, up to the point we are unaware of their presence, and we stop questioning their form and how (or if) they work. Marc presents three different anthropomorphic – uncanny, shocking – works that add a body to interfaces. Come along the speaker’s journey while developing them and explaining how critical design pieces that explore a speculative future can make us reflect on our relation with current interfaces. This works spark speculations and discussions about the shape of tech, its role in our society. Marc Teyssier is a Designer, Researcher and Associate Professor at De Vinci Research Center. Trained both as a Designer from l’Ecole de Design Nantes Atlantic (Nantes, France) and Engineer in Virtual Reality at Arts et Métiers ParisTech (Laval, France), he obtained a PhD in Engineering from the Polytechnic Institute of Paris in Human-Computer Interaction at Télécom Paris. Marc was a visiting Researcher at MIT Media Lab (Boston, US), Bristol University, (Bristol, UK) and Saarland University (Saarland, UK), where he pursued international collaboration while
teaching theory and practice in Design, Research and Digital Fabrication. His research is focused on Critical Design, and how technology impacts human interactions. Marc is now Principal Investigator of the “Resilient Futures” group at the DeVinci Innovation Center, where his works
propose an alternative to technology by exploring sustainable innovations, from low-Tech devices to bio-fabrication This talk was given at a TEDx event using the TED conference format but independently organized by a local community. Learn more at https://www.ted.com/tedx

The tragic myth of the Sun God’s son – Iseult Gillespie

Dive into the Greek myth of Helios and Phaethon, where the Sun God allows his mortal son to drive his chariot for a day.

Every morning, Helios unleashed his golden chariot, and set out across the sky. As the Sun God transformed dawn into day, he thought of his son, Phaethon, below. To prove to Phaethon that he was truly his father, Helios decided to grant him anything he wanted. Unfortunately, what Phaethon wanted was to drive Helios’ chariot for a day. Iseult Gillespie shares the tragic myth of the charioteer.

Lesson by Iseult Gillespie, directed by Raghav Arumugam and Jagriti Khirwar.

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How to write your own success story | RSA Event

Essential strategies for underrepresented women

The modern workplace can be tough to navigate. But women of colour in particular are hired, promoted, paid, and retained at lower rates than other groups. Many underrepresented women feel like they need to work twice as hard to get half the recognition.

What needs to change to level the playing field? What can underrepresented women do for themselves and each other to get to where they want to be? What should employers really do to nurture diverse talent? Award-winning coach and author Octavia Goredema shares a playbook for women to claim power in spaces where they are often the minority. She outlines strategies for navigating crucial career milestones, knowing your true worth and values, and charting success and fulfilment in the workplace and beyond.

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Future of work for start-up founders | Sankha Deep Das | TEDxCardiffUniversity

NOTE FROM TED: TEDx events are independently organized by volunteers. The guidelines we give TEDx organizers are described in more detail here: http://storage.ted.com/tedx/manuals/tedx_content_guidelines.pdf

The future of the workplace is at the moment, very unclear and full of assumptions and theories. For start-ups, this means a whole new challenge but presents a once-in-a-lifetime opportunity to create a brand new remote-first work culture. Sankha is currently the Founder & CEO of Lattice, a construction technology company headquartered in London. He had previously founded 2 startups in property investment & fintech space. He holds a Master’s degree in Business Administration from Cardiff University, 2010-2011. This talk was given at a TEDx event using the TED conference format but independently organized by a local community. Learn more at https://www.ted.com/tedx

When Will COVID End?

Coming up on two years of the Coronavirus pandemic, how much longer will it last? Is it like the Spanish flu or will it never go away?
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Written by: Gregory Brown & Mitchell Moffit
Edited by: Luka Šarlija

SOURCES:
https://www.nature.com/articles/d41586-021-03619-8
https://www.nature.com/articles/d41https://www.nature.com/articles/d41586-020-02544-6
586-021-03552-w
https://www.nature.com/articles/d41586-021-02275-2
https://www.nature.com/articles/d41586-021-00121-z
https://www.nature.com/articles/d41586-021-00268-9
https://www.gov.uk/government/publications/long-term-evolution-of-sars-cov-2-26-july-2021/long-term-evolution-of-sars-cov-2-26-july-2021
https://pubmed.ncbi.nlm.nih.gov/33831132/
https://pubmed.ncbi.nlm.nih.gov/33275900/
https://pubmed.ncbi.nlm.nih.gov/33464914/
https://pubmed.ncbi.nlm.nih.gov/32105090/
https://pubmed.ncbi.nlm.nih.gov/33289156/
https://www.nature.com/articles/d41586-021-00457-6?sap-outbound-id=382DC7C3B639EE3A28152D1161F765CCEB36860C

Hongqiao Liu: Can China achieve its ambitious climate pledges? | TED Countdown

In 2020, China’s President Xi Jinping pledged that China would both peak its emissions by 2030 and achieve net-zero emissions by 2060 — a change that will require action at an unheard-of scale and speed. Can the country actually achieve this ambitious vision? In this forward-looking talk, environmental journalist and analyst Hongqiao Liu explores what the world’s largest carbon emitter (and second-largest economy) will need to do to get there.

Countdown is TED’s global initiative to accelerate solutions to the climate crisis. The goal: to build a better future by cutting greenhouse gas emissions in half by 2030, in the race to a zero-carbon world. Get involved at https://countdown.ted.com/sign-up

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Watch the full 2021 TED Countdown Global livestream here: https://youtu.be/SG_vqlb1pOQ

Visit http://TED.com to get our entire library of TED Talks, transcripts, translations, personalized talk recommendations and more.

The TED Talks channel features the best talks and performances from the TED Conference, where the world’s leading thinkers and doers give the talk of their lives in 18 minutes (or less). Look for talks on Technology, Entertainment and Design — plus science, business, global issues, the arts and more. You’re welcome to link to or embed these videos, forward them to others and share these ideas with people you know.

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Why This Zig-Zag Coast Guard Search Pattern is Actually Genius – Smarter Every Day 268

Thanks to the Coast Guard for letting me tag along!
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GET SMARTER SECTION

This topic is incredibly deep. We’ve just scratched the surface here.

http://rdept.cgaux.org/documents/CoxswainSAR-ReferenceGuide.pdf

Search gets VERY complicated:
https://www.navcen.uscg.gov/pdf/Theory_of_Search.pdf

More on the Coast Guard
https://www.gocoastguard.com/Careers?gclid=CjwKCAiA55mPBhBOEiwANmzoQqKDf6vDL7m8-K1_pUt31ZO28kOE-zdUsL3oXwU8Uh42YWrUAWPs1hoCsS0QAvD_BwE

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Sexual Desire Is Way More Complicated Than You Think

Sex drive. Libido. Lust. Whatever you call it, sexual desire is a lot more complicated than you might think. In this week’s Body Language, we break down exactly how sexual desire works and all the exciting science around it.
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Sexual desire is the want for some sort of sexual interaction with someone or yourself. Oftentimes because desire in and of itself is not fully understood, it is often referred back to food. So with food, you can have a desire for something, but there is no arousal for it, meaning that yeah, I really want some cake, but your mouth didn’t water, right. So the arousal portion is more of the physical response to the desire. So basically, someone can want to have sex but they may not be physically aroused. And the reverse is also true, someone can be physically aroused but have no mental or emotional desire to engage in sexual activity. This mismatch is called arousal non-concordance, and studies show that women are more likely to experience it than men are. And to understand more about issues like this, it’s important to untangle physical arousal from sexual desire. In fact, there are actually two different kinds of desire.

So desire is actually split into the two. It’s the spontaneous desire as well as the responsive desire. Spontaneous desire is where the thought or feeling of ‘I’d like to have sex’ sort of just pops into your head out of the blue. Responsive desire is where you may not really be in the mood, but after a little warm-up, like kissing, touching, or flirting, you start to want to have sex.

One of the biggest misconceptions about desire is that it should be spontaneous only. This misconception feeds into common stereotypes we see around us, like men having out-of-control sexual appetites or women portrayed as having little innate desire. However, that’s far from the truth. Anyone, regardless of sex or gender, can experience spontaneous or responsive desire.

#bodylanguage #seeker #sexdrive #desire #arousal #libido

Read More:
The Misunderstood Science of Sexual Desire
https://www.thecut.com/2018/04/the-misunderstood-science-of-sexual-desire.html
It turns out, however, that we only understood half the story. The media mostly cast responsive desire as a women’s issue. Yet Basson said from the beginning that men also feel this slow kind of desire. Close to two decades later, it’s a misunderstanding she’s still eager to correct.

The Dual Control Model of Sexual Response
https://kinseyinstitute.org/research/dual-control-model.php
The researchers liken it to having both a gas pedal (excitation or SES) and a brake pedal (inhibition or SIS) in a car – every person will engage one or both pedals to a differing degree in any particular sexual situation, depending on their unique sexual physiology, history, and personality.

Asexuality: The ascent of the ‘invisible’ sexual orientation
https://www.bbc.com/worklife/article/20210507-asexuality-the-ascent-of-the-invisible-sexual-orientation
Indeed, asexuality – defined generally as not experiencing sexual attraction – has been called “the invisible orientation”…But asexuality is a spectrum, where some may identify as demisexual, for example, meaning they don’t experience sexual attraction until forming an emotional bond with someone. It’s also not synonymous with aromanticism, which applies to those who don’t experience romantic attraction.

Editor’s Note: At Seeker, we recognize that people of many genders and identities have vaginas and uteruses, and are affected by the topics covered in Body Language: not only women. Where gendered language does appear is in reference to specific language used within the scientific studies cited.
___________________

Body Language is Seeker’s latest series diving into the world of female health. For so long, the medical field only used male bodies to conduct research, creating a gap in terms of what we currently know about female bodies. In this series, we’ll be talking to experts to get a better understanding of some of these issues, and we discover how incredibly cool the female body is and how much more we still have to learn about it.

Seeker empowers the curious to understand the science shaping our world. We tell award-winning stories about the natural forces and groundbreaking innovations that impact our lives, our planet, and our universe.

Oxford’s sum of sines interview question

Solve this to get into Oxford!

2021 Oxford MAT Questions
https://www.maths.ox.ac.uk/system/files/attachments/test21.pdf
2021 Oxford MAT Solutions
https://www.maths.ox.ac.uk/system/files/attachments/websolutions21.pdf

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Could Eye Drops Replace Your Glasses?

Go to http://Brilliant.org/SciShow to try their Scientific Thinking course. Sign up now and get 20% off an annual Premium subscription.

Getting older means it’s likely that your eyes will have trouble focusing on things at close distances, so we are often prescribed glasses to combat this problem. But what if there were eye drops that could achieve the same results?

Hosted by: Hank Green

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Sources:
https://www.medpagetoday.com/ophthalmology/generalophthalmology/95372
https://www.mayoclinic.org/diseases-conditions/presbyopia/symptoms-causes/syc-20363328
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3939740/
https://www.medscape.com/viewarticle/961999
https://www.reviewofoptometry.com/article/a-peek-at-the-pinhole#footnotes
https://www.medscape.com/viewarticle/961999
https://www.reviewofophthalmology.com/article/can-patients-just-drop-presbyopia
https://www.ncbi.nlm.nih.gov/books/NBK556128/
https://www.drugs.com/pro/vuity-eye-drops.html
https://journals.lww.com/apjoo/fulltext/2020/06000/a_review_of_pharmacological_presbyopia_treatment.8.aspx

Image Sources:
https://www.storyblocks.com/video/stock/senior-man-browsing-smarthone-on-the-balcony-bwy_suz8qjkw237ov
https://commons.wikimedia.org/wiki/File:Presbyopia.png
https://www.storyblocks.com/video/stock/pov-of-female-optometrist-moving-light-back-and-forth-to-test-eye-muscles-of-patient-spbas-woman-doctor-checks-eyesight-oculist-examining-sight-concept-hospital-headshot-eye-health-svm6gn00utkvi84v44
https://www.istockphoto.com/photo/man-drops-eye-drops-install-lenses-moisturizing-gm1322256607-408271722
https://www.istockphoto.com/vector/vector-scientific-illustration-of-a-convex-lens-or-converging-lens-isolated-on-gm1287463649-383669887
https://www.istockphoto.com/photo/vintage-pinhole-camera-gm123208135-11981199
Grand Canyon National Park: Annular Eclipse Viewing 1218
https://www.storyblocks.com/video/stock/the-blue-eye-is-an-extreme-close-up-of-the-iris-and-pupil-widening-and-tapering-slu1f5g5njugug1h3
https://www.storyblocks.com/video/stock/working-aperture-lens-lens-iris-while-operating-aperture-ring-2-ginwl
https://www.istockphoto.com/photo/lake-minnewanka-mount-inglismaldie-banff-national-park-alberta-canada-gm873122912-243846756
https://commons.wikimedia.org/wiki/File:Pilocarpine_molecule_ball.png
https://www.istockphoto.com/photo/close-up-on-eyes-of-young-woman-with-dyed-hair-in-studio-gm1207244495-348480918
https://www.istockphoto.com/photo/female-looking-into-diopter-gm168267485-16737631
https://www.istockphoto.com/photo/how-many-letters-can-you-read-on-the-chart-gm1305317614-396240131
https://www.storyblocks.com/video/stock/sunrise-behind-los-angeles-time-lapse-hreo_8fe_iqyadcfh
https://www.storyblocks.com/video/stock/new-york-city-night-street-scenery-urban-metropolis-background-suo6rf19irwea2yb
https://www.istockphoto.com/photo/eye-drops-gm517900945-48920550

Why does hand sanitizer feel cold? #shorts #science

Emma Dauster: Writer
Attabey Rodríguez Benítez: Script Editor
Luke Rosener: Fact Checker
Bonnie Meyer: Managing Editor
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Hank Green: Executive Producer, Host

Sources:
https://www.mayoclinic.org/first-aid/first-aid-fever/basics/art-20056685
https://ahdictionary.com/word/search.html?q=room+temperature
http://scienceline.ucsb.edu/getkey.php?key=4875
https://chem.libretexts.org/Bookshelves/Physical_and_Theoretical_Chemistry_Textbook_Maps/Supplemental_Modules_(Physical_and_Theoretical_Chemistry)/Physical_Properties_of_Matter/States_of_Matter/Phase_Transitions/Fundamentals_of_Phase_Transitions
https://link.springer.com/article/10.1007%2Fs00348-007-0376-1

Image Sources:
https://commons.wikimedia.org/wiki/File:3D_model_hydrogen_bonds_in_water.svg
https://commons.wikimedia.org/wiki/File:Propan-2-ol-3D-balls.png
https://www.istockphoto.com/photo/afro-woman-applying-hand-sanitizer-during-covid-19-gm1256172936-367720375
https://www.istockphoto.com/photo/black-woman-using-hand-sanitizer-to-wash-hands-gm1212584131-352064220

There’s a £100,000 coin buried under this London building

The 1933 British penny is one of the most famous coins in the world. I’m not saying this is definitely a heist movie waiting to happen… but I do think someone should write it. ■ Thanks to the team at Baldwin’s, and the penny’s owner, for letting me film it! https://www.baldwin.co.uk/

I’m at https://tomscott.com
on Twitter at https://twitter.com/tomscott
on Facebook at https://facebook.com/tomscott
and on Instagram as tomscottgo

Tzeporah Berman: The bad math of the fossil fuel industry | TED Countdown

We currently have enough fossil fuels to progressively transition off of them, says climate campaigner Tzeporah Berman, but the industry continues to expand oil, gas and coal production and exploration. With searing passion and unflinching nerve, Berman reveals the delusions keeping true progress from being made — and offers a realistic path forward: the Fossil Fuel Non-Proliferation Treaty. Learn more about the global initiative for transparency and accountability in phasing out fossil fuels forever, supported by the Dalai Lama, Nobel Prize laureates and many more.

Countdown is TED’s global initiative to accelerate solutions to the climate crisis. The goal: to build a better future by cutting greenhouse gas emissions in half by 2030, in the race to a zero-carbon world. Get involved at https://countdown.ted.com/sign-up

Learn more about #TEDCountdown:
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Watch the full 2021 TED Countdown Global livestream here: https://youtu.be/SG_vqlb1pOQ

Visit http://TED.com to get our entire library of TED Talks, transcripts, translations, personalized talk recommendations and more.

The TED Talks channel features the best talks and performances from the TED Conference, where the world’s leading thinkers and doers give the talk of their lives in 18 minutes (or less). Look for talks on Technology, Entertainment and Design — plus science, business, global issues, the arts and more. You’re welcome to link to or embed these videos, forward them to others and share these ideas with people you know.

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5 Ways to Use Your Body as a Charger

Devices that collect data about our bodies need power, but they also might need to be very small or even ingestible. To avoid including batteries in these cases, researchers are looking for ways to harvest energy from the body itself.

Hosted by: Michael Aranda

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Sources:
General
https://www.sciencedirect.com/science/article/abs/pii/S0956566320304048?via%3Dihub

Heat
https://iopscience.iop.org/article/10.1088/0964-1726/23/10/105002/pdf
https://www.sciencedirect.com/science/article/abs/pii/S0196890417311172J1xYAAAAA:J9SuD5CfnLZ7JM14S5FhK2ODX33WW-ikNGxPojuMwLzYIlPj0J7zeU1lxhySGvw7_WPB4hAbOg
https://www.sciencedirect.com/science/article/pii/S0924424709000818?casa_token=cn75R9zCs9MAAAAA:KczaLgQkzzkV2Oq6P9S0HdLtjGsIGH8Ry4MrdHRp9zSa9Nkl82ov5xLEleUIqMESkvIs1NMy7qo
https://www.researchgate.net/profile/V-Leonov-2/publication/267816893_Energy_Harvesting_for_Self-Powered_Wearable_Devices/links/54c20f470cf2dd3cb9591414/Energy-Harvesting-for-Self-Powered-Wearable-Devices.pdf
https://www.mdpi.com/1424-8220/20/1/61/htm

https://www.sciencedirect.com/science/article/abs/pii/S0306261918305452
https://www.britannica.com/science/pyroelectricity
https://pubs.acs.org/doi/10.1021/acsanm.9b00033
https://books.google.co.uk/books?id=VXQdq0B3tnUC&pg=SA32-PA113&redir_esc=y#v=onepage&q&f=false

Motion
https://pubs.acs.org/doi/10.1021/acsnano.0c09803
https://pubs.acs.org/doi/full/10.1021/acsnano.7b02975
https://www.sciencedirect.com/science/article/pii/S1748013220300517?casa_token=3GkoTyknatoAAAAA:C-JngY1yOFoC0KGgP3gouSzhncLYj62XiV14jiGsB6WCQ9pKk5yd9ZhtW7yvgmeE34AFldU1stU
http://nanofm.mse.gatech.edu/Papers/Liu_et_al-2018-Advanced_Materials.pdf

https://www.sciencedirect.com/science/article/pii/S0924424716303831?casa_token=37FmFTcSkcAAAAAA:b9VgWbyk5jTan2t3JcXvCmAGIc40fkkyOjizFB10Kdavmo1wvKFJ191BrIKmMnfT_HrFi34uO_U
https://link.springer.com/chapter/10.1007/978-981-16-5157-1_18
https://www.sciencedirect.com/science/article/pii/S0924424708001398?casa_token=WiXQvEBF9EsAAAAA:SKVLriJuYTZ3uixUiwogWOPIrN1Hx84NLFQ3lwYb0zO7dJjrII45Ku2Cn8iK3v2F8xC5unD0yqQ
https://www.researchgate.net/profile/Ichiro-Yamada-3/publication/320998442_Investigation_of_Kinetic_Energy_Harvesting_from_Human_Body_Motion_Activities_using_FreeImpact_Based_Micro_Electromagnetic_Generator/links/5a0645ecaca272ed279c47d0/Investigation-of-Kinetic-Energy-Harvesting-from-Human-Body-Motion-Activities-using-Free-Impact-Based-Micro-Electromagnetic-Generator.pdf

Smaller motion
https://iopscience.iop.org/article/10.1088/0964-1726/18/3/035001/meta?casa_token=RSm_xuHyk9kAAAAA:HNkyNVo0UR38GcO4T9FtgHxpiV_S_3BbN9lL9rvTO9bosN5KYdyg5iRZTZvazP7Ei6kKvG85Pg
https://ieeexplore.ieee.org/abstract/document/1496534?casa_token=di1vaj7XGt4AAAAA:ubU4WkPtvuqhmh9ymzW4louTwpG1qleuDmjJ4hJPdoqOrPsKvjJqiwffhdD3TIvrnTxNGjEN3Q
https://www.sciencedirect.com/science/article/abs/pii/S0956566320304048?via%3Dihub
https://onlinelibrary.wiley.com/doi/abs/10.1002/adfm.202008242

Sweat
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5371639/
https://www.nature.com/articles/s41928-020-0443-7
https://pubs.acs.org/doi/full/10.1021/acssensors.8b01218

Stomach acid
https://www.nature.com/articles/s41551-016-0022
https://www.mdpi.com/2079-9292/8/7/804

Images
https://commons.wikimedia.org/wiki/File:ElectricCurrent.gif
https://commons.wikimedia.org/wiki/File:Thermoelectric_Generator_Diagram.svg
https://commons.wikimedia.org/wiki/File:Thermoelectric_glove.jpg
https://commons.wikimedia.org/wiki/File:Pyroelectric_material.svg
https://commons.wikimedia.org/wiki/File:Attractive-electric-force-between-hair-and-balloon.jpg
https://commons.wikimedia.org/wiki/File:Lateral_sliding_mode_of_triboelectric_nanogenerator.tif
https://commons.wikimedia.org/wiki/File:Perovskite.svg
https://commons.wikimedia.org/wiki/File:%D8%B4%D9%85%D8%A7%D8%AA%DB%8C%DA%A9_%D8%A7%D8%AB%D8%B1_%D9%BE%DB%8C%D8%B2%D9%88%D8%A7%D9%84%DA%A9%D8%AA%D8%B1%DB%8C%DA%A9.jpg
https://news.mit.edu/2017/engineers-harness-stomach-acid-power-tiny-sensors-0206

The Frog with Hidden Claws

A frog with retractable claws? Weird. A frog with claws that it has to push through its skin to use? Even weirder.

Hosted by: Hank Green

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Sources:
https://doi.org/10.1098/rsbl.2008.0219
https://www.researchgate.net/profile/Madhava-Meegaskumbura/publication/259644040_AMPHIBIANS_OF_THE_INDOMALAYAN_REALM/links/00b4952d090e8b152b000000/AMPHIBIANS-OF-THE-INDOMALAYAN-REALM.pdf#page=19
https://zslpublications.onlinelibrary.wiley.com/doi/pdf/10.1111/j.1469-7998.2009.00631.x
https://www.newscientist.com/article/dn13991-horror-frog-breaks-own-bones-to-produce-claws/
http://dx.doi.org/10.1111/j.1469-7580.2009.01068.x

Image Sources:
Communication with David C. Blackburn
https://www.istockphoto.com/photo/black-and-white-cat-scratches-his-nails-on-a-sofa-gm1280290840-378636221
https://commons.wikimedia.org/wiki/File:Ke_-_Trichobatrachus_robustus_-_4.jpg
https://commons.wikimedia.org/wiki/File:TrichobatrachusGreen.jpg
https://www.istockphoto.com/photo/fluffy-gray-cat-gm576748574-99127103
https://commons.wikimedia.org/wiki/File:Ke_-_Trichobatrachus_robustus_-_5.jpg
https://commons.wikimedia.org/wiki/File:Pleurodeles_waltl_by_Ark.jpg
https://commons.wikimedia.org/wiki/File:Pleurodeles_waltl04.jpg

Ilissa Ocko: The fastest way to slow climate change now | TED Countdown

“Cutting methane is the single fastest, most effective opportunity to reduce climate change risks in the near term,” says atmospheric scientist Ilissa Ocko. That’s because, unlike carbon dioxide, methane’s warming power doesn’t come from a gradual buildup over time but is almost entirely from recent emissions. Ocko identifies three main sources of methane pollution which, if addressed, could dramatically slow down the rate of global warming within years — not decades. “This is the methane moment,” Ocko says.

Countdown is TED’s global initiative to accelerate solutions to the climate crisis. The goal: to build a better future by cutting greenhouse gas emissions in half by 2030, in the race to a zero-carbon world. Get involved at https://countdown.ted.com/sign-up

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Leave early from work to go diving? This is how I do it. | Nichole Danser | TEDxOranjestad

Nichole was a high school teacher at the International School of Aruba when together with a group of students they began restoring corals in the Aruban reefs. After teaching math in California for 6 years Nichole moved to Italy to live and teach in the country sides of Tuscany. After two years in Florence the blue oceans called her to the beautiful island of Aruba where she taught Math at the International School.

Her foundation, ScubbleBubbles, started as a school project. Nichole, as their teacher, convinced 8 students to learn how to SCUBA dive. The group spent the first year working on skills and enjoying dives around Aruba, but over time they noticed the coral reefs were changing. They spent a year conducting research, raising money, and traveling to Bonaire to get specialized training on coral restoration.

The ScubbleBubbles Foundation is a part of our Reef Rescue Network, and Nichole is in charge to certify new PADI Reef Rescue Divers on the island of Aruba. The foundation focusses on getting more local youth involved in ocean conservation activities. This talk was given at a TEDx event using the TED conference format but independently organized by a local community. Learn more at https://www.ted.com/tedx

A Cause Greater Than Self – What We Can Learn from Our Veterans | Mary Whyte | TEDxRiverOaks

American figurative artist, Mary Whyte, details her quest to paint a portrait of America. Her talk recounts her decision to travel to each state to paint veterans and some of the fascinating lessons she learned about American veterans along the way. Ms. Whyte is known internationally for her watercolors of contemporary people. Her works are in private, corporate, university and public collections nationwide, and have been featured in numerous media outlets including CBS Sunday Morning, PBS and NPR.

The author of seven books including We the People: Portraits of Veterans in America, Whyte’s work has also been featured in many international publications, including periodicals and books in China, Russia, France, Germany, Canada and Taiwan.

Recipient: Portrait Society of America’s Gold Medal, the Carolinas Freedom Foundation’s Freedom Award, and the South Carolina Governor’s Award for the Arts, SC’s highest honor in the arts.

Recipient: 2020 National DAR Medal of Honor and the 2020 NSDAR Women in the Arts Award. In 2021 Mary Whyte received an honorary doctorate degree from Converse University in Spartanburg, South Carolina.

In 2019 Whyte founded the Patriot Art Foundation as a means to honor and inspire veterans through the arts. This talk was given at a TEDx event using the TED conference format but independently organized by a local community. Learn more at https://www.ted.com/tedx

The Moon: A Detour on the way to Mars? | Daniel Ricardo | TEDxUniMelb

As humanity takes strides towards sending humans to Mars and onwards into deep space, it is easy to forget where we’ve already been. Daniel Ricardo explores the pivotal role the Moon will play in the coming space-age, especially when we have only scratched the surface of understanding the Moon’s origins and opportunities. Daniel Ricardo is currently pursuing a PhD seeking to understand the properties of water ice in the Moon’s permanently shadowed polar craters. From his experience working at NASA on a Mars rover to founding an Australia-wide robotics competition to simulate a mission to the Moon, he is dedicated to contributing and supporting the growth of the Australian Space Industry. This talk was given at a TEDx event using the TED conference format but independently organized by a local community. Learn more at https://www.ted.com/tedx

Counting Species out of Thin Air

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Recent proof-of-concept studies showed that researchers were able to survey animals in an area simply by vacuuming up DNA in the air.

Hosted by: Hank Green

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Sources:
https://www.sciencedirect.com/science/article/pii/S2351989418303500
https://www.cell.com/current-biology/fulltext/S0960-9822(21)01650-X
https://www.nature.com/articles/s42003-021-01760-8
https://www.eurekalert.org/news-releases/938583
https://www.cell.com/iscience/fulltext/S2589-0042(21)01487-5
https://www.eurekalert.org/news-releases/938146

Image Sources:
https://svs.gsfc.nasa.gov/14016
https://www.istockphoto.com/photo/scientist-ecologist-taking-a-water-sample-in-the-forest-gm1125152554-295666979
https://commons.wikimedia.org/wiki/File:EDNA_Water_Sampling_(36024122736).jpg
https://www.istockphoto.com/photo/vacum-cleaner-hepa-13-filter-xxxl-gm450453997-30123416
https://www.cell.com/current-biology/fulltext/S0960-9822(21)01650-X#secsectitle0015
https://commons.wikimedia.org/wiki/File:Bog_turtle_survey_team_discussing_the_turtles_(8426057485).jpg
https://commons.wikimedia.org/wiki/File:Tyrannosaurus_Rex_Holotype.jpg
https://commons.wikimedia.org/wiki/File:Citipati_embryo.jpg
https://www.eurekalert.org/multimedia/811758
https://www.eurekalert.org/multimedia/811756
https://www.istockphoto.com/photo/hatching-gm1130236156-298847075
https://www.istockphoto.com/photo/aerial-view-on-spacious-pine-forest-at-sunrise-gm495508534-78024685

Concussion: hard-hitting facts | Elizabeth Pieroth | TEDxChicago

2.7 millions Americans will ‘get their bell rung’ by a concussion this year. This condition is classified as a mild traumatic brain injury, potentially causing major deficits. Dr. Elizabeth Pieroth understands first-hand the impact of concussion on pro athletes, youth athletes and average people. She explains new science behind concussion treatment and why the old school ‘dark room’ is no longer valid or effective. Elizabeth is a neuropsychologist who has spent her career dedicated to the assessment and treatment of individuals who suffer concussions. She works with individuals ranging from children to professional athletes. This talk was given at a TEDx event using the TED conference format but independently organized by a local community. Learn more at https://www.ted.com/tedx

The (Nearly) Perfect Pi Approximation #shorts

We can’t write out every digit of Pi every time we use it, but we’ve got to represent it somehow. And you were probably taught that 22/7 was a great option. Well… it’s an okay option. It’s not bad, but it’s not amazing.

355/113 is so close to the real value of Pi that you don’t encounter a better approximation until you hit 52163/16604. #shorts

Fare fumetti vuol dire raccontare una storia con il disegno | Giulio De Vita | TEDxPordenoneStudio

Fare fumetti non vuol dire solo disegnare, vuol dire raccontare una storia attraverso il disegno.

Giulio De Vita a TEDxPordenoneStudio ci ha raccontato come il suo sogno di bambino oggi sia diventato una storia di successo che coinvolge l’intera sua città, Pordenone.

Nella sua carriera la parola chiave è sempre stata esplorare.

Esplorare tutti gli ambiti possibili in cui esprimere la sua creatività: dal fumetto, alla pubblicità, al cinema, alle performance, all’invenzione di strumenti per disegnare.

La matita da sempre è la sua bacchetta magica che permette di creare qualsiasi cosa: persone, ambienti, creature, vascelli, astronavi.

Alla base di tutto il suo lavoro c’è sempre l’emozione perchè regalare emozioni è lo strumento per ottenere dei prodotti memorabili.

Giulio De Vita, pordenonese DOC, è tra i fumettisti italiani più conosciuti e apprezzati a livello internazionale.
Nella sua lunga carriera ha disegnato personaggi della Marvel e Disney, ha realizzato storyboard per Vasco Rossi, Zucchero, 883.
Ha realizzato fumetti per l’editoria, internazionali ed ha partecipato con esposizioni personali in diverse gallerie mondiali.
Oltre ad essere fumettista, Giulio De Vita è anche regista, scenografo, creativo pubblicitario. Ha collaborato alla realizzazione di campagne pubblicitarie per Parmacotto, Poltrone Frau, Surgela, Parmalat, Antica gelateria del corso, Crédit Agricole. É l’ideatore del PAFF! Palazzo Arti Fumetto Friuli, di cui dal 2018 ne è direttore artistico. This talk was given at a TEDx event using the TED conference format but independently organized by a local community. Learn more at https://www.ted.com/tedx

Испытание или подарок судьбы | Александра Васильева | TEDxBaumanStStudio

В выступлении Александра расскажет историю о том, как один “подарок судьбы” научил ее создавать новые возможности. Александра родилась слепой, но это не стало для нее преградой.
ПРЕДПРИНИМА́ТЕЛЬ This talk was given at a TEDx event using the TED conference format but independently organized by a local community. Learn more at https://www.ted.com/tedx

Ashoka Fellow | Dr. Priscilla M Achakpa | TEDxAshokaAfrica

Watch Dr. Priscilla Achakpa as shares her journey in advocating for more accountability and sustainable practices by the industry in Northern Nigeria and how she has engaged thousands of women to act for the planet, making the environment also a gender matter. Dr. Priscilla M Achakpa, is the Founder/Global President of, Women Environmental Programme (WEP) a regional NGO, that has been in existence for the past 24 years. She has done extensive work on the rights of women and youth on environmental, socio-economic and political issues. She was the National Coordinator, Water Supply and Sanitation Collaborative Council (WSSCC) Nigeria, Organizing Partner, Women Major Group for Africa at the UN Agenda2030, Member, Women &Gender Constituency @unfccc, Women4Water Partnership, Facilitator of the Women Major Groups at United Nations Environment Programme. she has received several awards at national and international level including Ashoka Fellows, “Climate Warrior, Vogue Magazine 2015, ECO Ambassador, Channels TV Nigeria and Deutsche Welle, a public broadcasting institution formed under German April 2016. This talk was given at a TEDx event using the TED conference format but independently organized by a local community. Learn more at https://www.ted.com/tedx

Jenny Scheinman, Nels Cline and Todd Sickafoose: “A Ride With Polly Jean” / “Ali Farka Touche” | TED

Settle in for a jazzy, transportive set by Jenny Scheinman with Nels Cline and Todd Sickafoose, performing “A Ride With Polly Jean” and “Ali Farka Touche.”

Visit http://TED.com to get our entire library of TED Talks, transcripts, translations, personalized talk recommendations and more.

The TED Talks channel features the best talks and performances from the TED Conference, where the world’s leading thinkers and doers give the talk of their lives in 18 minutes (or less). Look for talks on Technology, Entertainment and Design — plus science, business, global issues, the arts and more. You’re welcome to link to or embed these videos, forward them to others and share these ideas with people you know.

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What is a Number? – Numberphile

Featuring Asaf Karagila.
More links & stuff in full description below ↓↓↓

Asaf is a UKRI Future Leaders Fellow. Asaf’s blog – http://karagila.org

Asaf’s Twitter – https://twitter.com/AsafKaragila

Numberphile podcast featuring Asaf – https://youtu.be/b6GLCTh5ARI

All the Numbers with Matt Parker – https://youtu.be/5TkIe60y2GI

Numberphile is supported by the Mathematical Sciences Research Institute (MSRI): http://bit.ly/MSRINumberphile

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And support from The Akamai Foundation – dedicated to encouraging the next generation of technology innovators and equitable access to STEM education – https://www.akamai.com/company/corporate-responsibility/akamai-foundation

NUMBERPHILE
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Trick to convert kilograms and pounds. #Shorts

Not everyone knows this simple method to convert kg and lbs quickly in your head! #Shorts

Reference
https://en.wikipedia.org/wiki/Kilogram#cite_note-1

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Killing Mosquitoes With a Flip of a Gene

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Eliminating certain species of mosquitoes could make summertime more enjoyable and cut down on the transmission of certain diseases. And scientists are looking into doing this by manipulating a single gene!

Hosted by: Hank Green

SciShow is on TikTok! Check us out at https://www.tiktok.com/@scishow
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Dr. Melvin Sanicas, Sam Lutfi, Bryan Cloer, Christoph Schwanke, Kevin Bealer, Jacob, Nazara, Ash, Jason A Saslow, Matt Curls, Eric Jensen, GrowingViolet, Jeffrey Mckishen, Christopher R Boucher, Alex Hackman, Piya Shedden, charles george, Tom Mosner, Jeremy Mysliwiec, Adam Brainard, Chris Peters, Silas Emrys, Alisa Sherbow

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Sources:
https://www.who.int/news/item/14-11-2019-mosquito-sterilization-offers-new-opportunity-to-control-chikungunya-dengue-and-zika
https://www.sciencedaily.com/releases/2010/05/100506092733.htm
https://www.sciencedirect.com/science/article/abs/pii/S0965174804000694
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4553422/
https://entomology.tamu.edu/2020/07/31/researchers-find-gene-to-convert-female-aedes-aegypti-mosquitoes-to-non-biting-males-with-implications-for-mosquito-control/
https://www.pnas.org/content/117/30/17702
https://www.nature.com/articles/s41467-021-24654-z
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7477762/
https://www.cdc.gov/mosquitoes/mosquito-control/community/sit/irradiated.html
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2946175/
https://www.nationalgeographic.com/animals/invertebrates/facts/mosquitoes?loggedin=true

Images:
https://www.storyblocks.com/video/stock/mosquitos-video-stock-footage-eug03aadxijtpuuqv
https://www.storyblocks.com/video/stock/a-man-applies-mosquito-spray-on-the-skin-of-his-hand-close-up-bkx9tmb-hjxusqafe
https://www.istockphoto.com/photo/x-and-y-chromosomes-in-cell-gm1190443970-337479993
https://www.istockphoto.com/photo/male-23-chromosome-pair-gm1325173580-410275477
https://www.istockphoto.com/photo/aedes-aegypti-mosquito-pernilongo-with-white-spots-and-white-background-gm1263464608-369829427
https://www.pnas.org/content/117/30/17702
https://www.istockphoto.com/photo/abstract-genetics-disease-gm1284442152-381578199
https://www.istockphoto.com/photo/aedes-aegypti-mosquito-biting-sucking-into-human-skin-soft-focu-gm624676810-109828557
https://commons.wikimedia.org/wiki/File:Aedes_aegypti_resting_position_E-A-Goeldi_1905.jpg
Mediterranean Fruit Fly
Screwworm - Cochliomyia hominivorax, National Key Deer Refuge, Big Pine Key, Florida
https://www.istockphoto.com/photo/many-mosquitoes-fly-over-green-grass-field-gm1033519616-276774826
https://www.istockphoto.com/photo/a-swarm-of-flying-mosquitoes-gm697726530-129358929
https://www.istockphoto.com/photo/family-rejoicing-in-sea-kayaks-at-sunset-gm522893593-50959480
https://www.istockphoto.com/vector/cartoon-flying-mosquito-vermin-insect-gm165733569-13573282
https://www.istockphoto.com/vector/cartoon-dead-mosquito-gm165738810-13521842
https://www.istockphoto.com/vector/banana-leaves-jungle-seamless-pattern-gm1209840507-350241057

Hledání vznešenosti v sobě samém | Anna Hogenová | TEDxPrague

Anna Hogenová se ve své řeči zamýšlí nad vztahem viditelného s neviditelným a nad probouzením se k vlastnímu světlu. Vedoucí oddělení filozofie a etiky na Filozofické fakultě UK. This talk was given at a TEDx event using the TED conference format but independently organized by a local community. Learn more at https://www.ted.com/tedx

Why do cats have vertical pupils? – Emma Bryce

Dive into the incredible diversity of animal pupils, and how the different shapes indicate the animal’s role in an ecosystem.

Peering into the eyes of different animals, you’ll see some extraordinarily shaped pupils. House cats, for one, are twilight hunters with vertically elongated pupils. Many grazing animals, like goats, have rectangular pupils. Other animals have crescent- or heart-shaped pupils. So, what’s going on? Why are there so many different pupil shapes? Emma Bryce digs into the science of animal vision.

Lesson by Emma Bryce, directed by Bálint Gelley, CUB Animation Ltd.

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