Why are some people left-handed? - Daniel M. Abrams - TED-Ed


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13 Things Only Left Handed People Understand 04:54
13 Things Only Left Handed People Understand
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Today we're talking about 13 problems that lefties have to deal with on a regular basis. The Left hand struggles. Hope this gave you a laugh. Stay tuned til the end for extra weirdness. :) *Lets be Social* Twitter - https://twitter.com/TheSocialBrooke Instagram - https://www.instagram.com/thesocialbrooke/ Facebook - https://www.facebook.com/Thesocialbrooke
The benefits of a bilingual brain - Mia Nacamulli 05:04
The benefits of a bilingual brain - Mia Nacamulli
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View full lesson: http://ed.ted.com/lessons/how-speaking-multiple-languages-benefits-the-brain-mia-nacamulli It’s obvious that knowing more than one language can make certain things easier — like traveling or watching movies without subtitles. But are there other advantages to having a bilingual (or multilingual) brain? Mia Nacamulli details the three types of bilingual brains and shows how knowing more than one language keeps your brain healthy, complex and actively engaged. Lesson by Mia Nacamulli, animation by TED-Ed.
Is it bad to hold your pee? - Heba Shaheed 03:58
Is it bad to hold your pee? - Heba Shaheed
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View full lesson: http://ed.ted.com/lessons/is-it-bad-to-hold-your-pee-heba-shaheed Humans should urinate at least four to six times a day, but occasionally, the pressures of modern life force us to clench and hold it in. How bad is this habit, and how long can our bodies withstand it? Heba Shaheed takes us inside the bladder to find out. Lesson by Heba Shaheed, animation by Artrak Studio.
Questions No One Knows the Answers to (Full Version) 12:08
Questions No One Knows the Answers to (Full Version)
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In the first of a new TED-Ed series designed to catalyze curiosity, TED Curator Chris Anderson shares his boyhood obsession with quirky questions that seem to have no answers. (Introducing the series "Questions no one knows the answers to") "Questions No One Knows the Answers to" was animated by Andrew Park (http://www.cognitivemedia.co.uk)
What would happen if you didn’t drink water? - Mia Nacamulli 04:52
What would happen if you didn’t drink water? - Mia Nacamulli
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View full lesson: http://ed.ted.com/lessons/what-would-happen-if-you-didn-t-drink-water-mia-nacamulli Water is essentially everywhere in our world, and the average human is composed of between 55 and 60% water. So what role does water play in our bodies, and how much do we actually need to drink to stay healthy? Mia Nacamulli details the health benefits of hydration. Lesson by Mia Nacamulli, animation by Chris Bishop.
4 Clever Riddles That’ll Test Your Intelligence 06:56
4 Clever Riddles That’ll Test Your Intelligence
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Subscribe to Bright Side : https://goo.gl/rQTJZz For copyright matters please contact us at: welcome@brightside.me Cryptograms were originally created not for entertainment purposes but for the encryption of military or personal secrets. Today, we invite you to try to decipher four riddles with hidden messages. Prove that you have a good logic! ---------------------------------------------------------------------------------------- Our Social Media: Facebook: https://www.facebook.com/brightside/ Instagram: https://www.instagram.com/brightgram/ 5-Minute Crafts Youtube: https://www.goo.gl/8JVmuC  ---------------------------------------------------------------------------------------- For more videos and articles visit: http://www.brightside.me/
The language of lying — Noah Zandan 05:42
The language of lying — Noah Zandan
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View full lesson: http://ed.ted.com/lessons/the-language-of-lying-noah-zandan We hear anywhere from 10 to 200 lies a day. And although we’ve spent much of our history coming up with ways to detect these lies by tracking physiological changes in their tellers, these methods have proved unreliable. Is there a more direct approach? Noah Zandan uses some famous examples of lying to illustrate how we might use communications science to analyze the lies themselves. Lesson by Noah Zandan, animation by The Moving Company Animation Studio.
10 Signs That You Are Highly Intelligent 05:36
10 Signs That You Are Highly Intelligent
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Top 10 signs you're actually a genius! Do you ever wonder if you might have more brain power than the average? Are you smart? If you're not too sure about your own intellect, it actually might be an indication that you're pretty intelligent! 10 Signs you are highly intelligent ●▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬● Test Yourself To See If You're A Genius - Only 1% Can Solve These Brain Puzzles ➥ https://youtu.be/92icXnmB80w Top 5 Signs You're A Natural Born Genius ➥ https://youtu.be/dh-agoAnKe8 ●▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬● ● If you enjoy my videos and would like to help support my channel, please feel free to donate to my tip jar ➤ https://goo.gl/mMvRfp Thank...
What are those floaty things in your eye? - Michael Mauser 04:05
What are those floaty things in your eye? - Michael Mauser
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View full lesson: http://ed.ted.com/lessons/what-are-those-floaty-things-in-your-eye-michael-mauser Sometimes, against a uniform, bright background such as a clear sky or a blank computer screen, you might see things floating across your field of vision. What are these moving objects, and how are you seeing them? Michael Mauser explains the visual phenomenon that is floaters. Lesson by Michael Mauser, animation by Reflective Films.
Why do we cry? The three types of tears - Alex Gendler 03:59
Why do we cry? The three types of tears - Alex Gendler
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View full lesson: http://ed.ted.com/lessons/why-do-we-cry-the-three-types-of-tears-alex-gendler Whether we cry during a sad movie, while chopping onions, or completely involuntarily, our eyes are constantly producing tears. Alex Gendler tracks a particularly watery day in the life of Iris (the iris) as she cycles through basal, reflex and emotional tears. Lesson by Alex Gendler, animation by The Moving Company Animation Studio.
13 Struggles All Left-Handed People Know To Be True 01:54
13 Struggles All Left-Handed People Know To Be True
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"Did you know that left-handed people die 10 years earlier than right-handed people?" Check out more awesome videos at BuzzFeedVideo! http://bit.ly/YTbuzzfeedvideo MUSIC Smile and Wave Licensed via Audio Network. SFX provided by Audioblocks.  (https://www.Audioblocks.com) Footage provided by VideoBlocks http://vblocks.co/x/BuzzFeedYouTube Made by BFMP www.buzzfeed.com/videoteam GET MORE BUZZFEED: www.buzzfeed.com/videoteam www.facebook.com/buzzfeedvideo www.instagram.com/buzzfeedvideo www.buzzfeed.com/video www.youtube.com/buzzfeedvideo www.youtube.com/buzzfeedyellow www.youtube.com/buzzfeedblue www.youtube.com/buzzfeedviolet BUZZFEED VIDEO BuzzFeed Motion Picture’s flagship channel. Sometimes funny, sometimes serious, always shareable. New videos posted daily! Subscribe to BuzzFeedVideo today! http://bit.ly/YTbuzzfeedvideo
What is dyslexia? - Kelli Sandman-Hurley 04:35
What is dyslexia? - Kelli Sandman-Hurley
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View full lesson: http://ed.ted.com/lessons/what-is-dyslexia-kelli-sandman-hurley Dyslexia affects up to 1 in 5 people, but the experience of dyslexia isn't always the same. This difficulty in processing language exists along a spectrum -- one that doesn't necessarily fit with labels like "normal" and "defective." Kelli Sandman-Hurley urges us to think again about dyslexic brain function and to celebrate the neurodiversity of the human brain. Lesson by Kelli Sandman-Hurley, animation by Marc Christoforidis.
Can you solve the egg drop riddle? - Yossi Elran 04:47
Can you solve the egg drop riddle? - Yossi Elran
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Check out our Patreon page: https://www.patreon.com/teded View full lesson: https://ed.ted.com/lessons/can-you-solve-the-egg-drop-riddle-yossi-elran The city has just opened its one-of-a-kind Faberge Egg Museum, with a single egg displayed on each floor of a 100-story building -- and the world’s most notorious jewel thief already has her eyes on the prize. Can you help the thief formulate a plan that will drop the most expensive egg she can get safely into her waiting truck? Yossi Elran shows how. Lesson by Yossi Elran, directed by Artrake Studio. Thank you so much to our patrons for your support! Without you this video would not be possible! Yuh Saito, Sarabeth...
History’s deadliest colors - J. V. Maranto 05:14
History’s deadliest colors - J. V. Maranto
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View full lesson: http://ed.ted.com/lessons/history-s-deadliest-colors-j-v-maranto When radium was first discovered, its luminous green color inspired people to add it into beauty products and jewelry. It wasn’t until much later that we realized that radium’s harmful effects outweighed its visual benefits. Unfortunately, radium isn’t the only pigment that historically seemed harmless or useful but turned out to be deadly. J. V. Maranto details history’s deadliest colors. Lesson by J. V. Maranto, animation by Juan M. Urbina.
5 tips to improve your critical thinking - Samantha Agoos 04:30
5 tips to improve your critical thinking - Samantha Agoos
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View full lesson: http://ed.ted.com/lessons/5-tips-to-improve-your-critical-thinking-samantha-agoos Every day, a sea of decisions stretches before us, and it’s impossible to make a perfect choice every time. But there are many ways to improve our chances — and one particularly effective technique is critical thinking. Samantha Agoos describes a 5-step process that may help you with any number of problems. Lesson by Samantha Agoos, animation by Nick Hilditch.
Why incompetent people think they're amazing - David Dunning 05:08
Why incompetent people think they're amazing - David Dunning
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Check out our Patreon page: https://www.patreon.com/teded View full lesson: https://ed.ted.com/lessons/why-incompetent-people-think-they-re-amazing-david-dunning How good are you with money? What about reading people’s emotions? How healthy are you, compared to other people you know? Knowing how our skills stack up against others is useful in many ways. But psychological research suggests that we’re not very good at evaluating ourselves accurately. In fact, we frequently overestimate our own abilities. David Dunning describes the Dunning-Kruger effect. Lesson by David Dunning, directed by Wednesday Studio, music and sound by Tom Drew. Thank you so much to our patrons for your support! Without you this video would not be...
5 Pictures To Test Your Intelligence 04:17
5 Pictures To Test Your Intelligence
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This is: 5 Pictures which will test your intelligence. Write in the comments how many and which ones of the riddle pictures you were able to solve :) Drawings by: https://www.instagram.com/felix_lumex On this Channel i upload a lot lot of riddles, puzzles and brain teasers. About lying people, escaping a prison or anything where you have to use your brain. Enjoy! :) Fur Elise by Audionautix is licensed under a Creative Commons Attribution license (https://creativecommons.org/licenses/by/4.0/) Artist: http://audionautix.com/
Why Europeans And Asians Evolved So Differently 10:40
Why Europeans And Asians Evolved So Differently
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Please Subscribe! http://testu.be/1FjtHn5 Early humans migrated all over the world to get us where we are today. The environments our ancestors inhabited made us all very different! + + + + + + + + TestTube Plus is built for enthusiastic science fans seeking out comprehensive conversations on the geeky topics they love. Host Trace Dominguez digs beyond the usual scope to deliver details, developments and opinions on advanced topics like AI, string theory and Mars exploration. TestTube Plus is also offered as an audio podcast on iTunes. + + + + + + + + Trace Dominguez on Twitter...
Why do people get so anxious about math? - Orly Rubinsten 04:37
Why do people get so anxious about math? - Orly Rubinsten
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View full lesson: http://ed.ted.com/lessons/why-do-people-get-so-anxious-about-math-orly-rubinsten Have you ever sat down to take a math test and immediately felt your heart beat faster and your palms start to sweat? This is called math anxiety, and if it happens to you, you’re not alone: Researchers think about 20 percent of the population suffers from it. So what’s going on? And can it be fixed? Orly Rubinsten explores the current research and suggests ways to increase math performance. Lesson by Orly Rubinsten, animation by Adriatic Animation.
A brief history of banned numbers - Alessandra King 04:43
A brief history of banned numbers - Alessandra King
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Check out our Patreon page: https://www.patreon.com/teded View full lesson: https://ed.ted.com/lessons/a-brief-history-of-banned-numbers-alessandra-king They say the pen is mightier than the sword, and authorities have often agreed. From outlawed religious tracts and revolutionary manifestos to censored and burned books, we know the potential power of words to overturn the social order. But as strange as it may seem, some numbers have also been considered dangerous enough to ban. Alessandra King details the history behind illegal numbers. Lesson by Alessandra King, directed by Juan M. Urbina Studios. Thank you so much to our patrons for your support! Without you this video would not be possible. Yankai Liu,...
Why do cats act so weird? - Tony Buffington 04:58
Why do cats act so weird? - Tony Buffington
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View full lesson: http://ed.ted.com/lessons/why-do-cats-act-so-weird-tony-buffington They’re cute, they’re lovable, and judging by the 26 billion views on over 2 million YouTube videos of them, one thing is certain: cats are very entertaining. But their strange feline behaviors, both amusing and baffling, leave many of us asking: Why do cats do that? Tony Buffington explains the science behind some of your cat’s strangest behaviors. Lesson by Tony Buffington, animation by Chintis Lundgren.
Why is it so hard to cure cancer? - Kyuson Yun 05:23
Why is it so hard to cure cancer? - Kyuson Yun
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Download a free audiobook and support TED-Ed's nonprofit mission: http://adbl.co/2gauxND Check out Siddhartha Mukherjee's "The Emperor of All Maladies": https://shop.ed.ted.com/collections/ted-ed-book-recommendations/products/the-emperor-of-all-maladies-a-biography-of-cancer View full lesson: https://ed.ted.com/lessons/why-is-it-so-hard-to-cure-cancer-kyuson-yun We’ve harnessed electricity, sequenced the human genome, and eradicated smallpox. But after billions of dollars in research, we haven’t found a solution for a disease that affects more than 14 million people and their families at any given time. Why is it so difficult to cure cancer? Kyuson Yun explains the challenges. Lesson by Kyuson Yun, directed by Artrake Studio. Check out our Patreon page: https://www.patreon.com/teded Thank you so much to our patrons for your support! Without you this video...
The myth of Prometheus - Iseult Gillespie 04:47
The myth of Prometheus - Iseult Gillespie
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Check out our Patreon page: https://www.patreon.com/teded View full lesson: https://ed.ted.com/lessons/the-myth-of-prometheus-iseult-gillespie Before the creation of humanity, the Greek gods won a great battle against a race of giants called the Titans. Most Titans were destroyed or driven to the eternal hell of Tartarus. But the Titan Prometheus, whose name means foresight, persuaded his brother Epimetheus to fight with him on the side of the Gods. Iseult Gillespie shares the myth of Prometheus. Lesson by Iseult Gillespie, directed by Léa Krawczyk. Thank you so much to our patrons for your support! Without you this video would not be possible. Yalda A., Susan Herder, Andrew Bosco, Craig Sheldon,...
The myth behind the Chinese zodiac - Megan Campisi and Pen-Pen Chen 04:23
The myth behind the Chinese zodiac - Megan Campisi and Pen-Pen Chen
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View full lesson: http://ed.ted.com/lessons/the-myth-behind-the-chinese-zodiac-megan-campisi-and-pen-pen-chen What’s your sign? In Western astrology, it’s a constellation determined by when your birthday falls in the calendar. But according to the Chinese zodiac (生肖), it’s your shuxiang, meaning the animal assigned to your birth year. Of the many myths explaining these animal signs and their arrangement, the most enduring one is that of The Great Race. Megan Campisi and Pen-Pen Chen recounts this classic myth. Lesson by Megan Campisi and Pen-Pen Chen, animation by Marta Prokopová.
Check your intuition: The birthday problem - David Knuffke 05:07
Check your intuition: The birthday problem - David Knuffke
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View full lesson: http://ed.ted.com/lessons/check-your-intuition-the-birthday-problem-david-knuffke Imagine a group of people. How big do you think the group would have to be before there’s more than a 50% chance that two people in the group have the same birthday? The answer is … probably lower than you think. David Knuffke explains how the birthday problem exposes our often-poor intuition when it comes to probability. Lesson by David Knuffke, animation by TED-Ed.
Video Description
View full lesson: http://ed.ted.com/lessons/why-are-some-people-left-handed-daniel-m-abrams

Today, about one-tenth of the world’s population are southpaws. Why are such a small proportion of people left-handed -- and why does the trait exist in the first place? Daniel M. Abrams investigates how the uneven ratio of lefties and righties gives insight into a balance between competitive and cooperative pressures on human evolution.

Lesson by Daniel M. Abrams, animation by TED-Ed.
Tags: Why are some people le   handed?   Daniel M. Abrams   TED   TED   Ed   TEDx   Le   hand   Le   handed   Proper hand   Right   hand   Right   handed   Identical twins   Handedness   Parents   Genetics   Competitive pressures   Cooperative pressures   Sports   Fighting hypothesis   Negative frequency   dependent selection   Evolution   Evolutionary advantage   Baseball   Switch hitter   Golf   Right   handed world   Equilibrium  

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