Think you know a thing or two about sex? Think again. In this fascinating talk, biologist Carin Bondar lays out the surprising science behind how animals get it on. (This talk describes explicit and aggressive sexual content.)

After fleeing war-torn South Sudan as a child, Mary Maker found security and hope in the school at Kenya's Kakuma Refugee Camp. Now a teacher of young refugees herself, she sees education as an essential tool for rebuilding lives -- and...

We answer your burning questions in our first-ever Q&A video. Thanks for asking, and for watching!!

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Credits...

Bird parent's calls can change how their babies develop! And, do you learn faster when playing a game to benefit yourself or other people?

In a brilliantly tongue-in-cheek analysis, Sebastian Wernicke turns the tools of statistical analysis on TEDTalks, to come up with a metric for creating "the optimum TEDTalk" based on user ratings. How do you rate it? "Jaw-dropping"?...

A quantum computer isn't just a more powerful version of the computers we use today; it's something else entirely, based on emerging scientific understanding -- and more than a bit of uncertainty. Enter the quantum wonderland with TED...

Peter van Uhm is the Netherlands' chief of defense, but that does not mean he is pro-war. In this talk, he explains how his career is one shaped by a love of peace, not a desire for bloodshed -- and why we need armies if we want peace.

Whether it's dandelions blooming in your backyard or purslane sprouting from the sidewalk, vegan forager Alexis Nikole Nelson is on a mission to show how freely growing flora could make its way to your plate. With contagious enthusiasm...

The underworld is overcrowded, and Zeus has ordered Hades to let some spirits out. Hades arranges all the souls of the dead in a line before Cerberus. When one of his three heads bites down on the soul in front of it, they'll get...

Hopefully this course has gotten you excited about all the things we can do with engineering. If so, today we’re going to try to help you answer a very important question: how do you become an engineer? What are the steps? What kinds of...

Sunscreen comes in many forms, each with its own impacts on your body and the environment. With so many options, how do you choose which sunscreen is best for you? To answer that question, Mary Poffenroth explains how sunscreens work and...

Language is complex, and when abstract or nuanced concepts get lost in translation, the consequences may be catastrophic. Given the complexities of language and cultural exchange, how do these epic miscommunications not happen all the...

Why do we have to choose between nationalism and globalism, between loving our countries and caring for the world? In a talk with lessons for avowed nationalists and globalists alike, Wanis Kabbaj explains how we can challenge this...

Paul Andersen explains the importance of selection in biology. Artificial selection occurs when humans choose traits that will be selected for or against. This has created the variety of domesticated animals and crops. He then...

Our next stop in our tour of the ethical lay of the land is utilitarianism. With a little help from Batman, Hank explains the principle of utility, and the difference between act and rule utilitarianism.

Do we really have free will? Today Hank explores possible answers to that question, explaining theories like libertarian free will and it’s counterpoint, hard determinism.

The evil wizard MoldeVort has been trying to kill you for years, and today it looks like he’s going to succeed. But your friends are on their way, and if you can survive until they arrive, they should be able to help stop him. Can you...

In Guatemala's 36-year conflict, 200,000 civilians were killed — and more than 40,000 were never identified. At the Forensic Anthropology Foundation of Guatemala, Fredy Peccerelli and his team use DNA, archeology and storytelling to help...

You're the chief advisor to an eccentric king who needs to declare his successor. He wants his heir to be good at arithmetic, lucky, and above all else, honest. So he's devised a competition to test his children, and ordered you to...

We're surrounded by choices in life, but psychologists have found that having those choices doesn't necessarily make us happy.

Low-status neighborhoods in the US are often stuck between stagnating assistance from the government and gentrification at the hands of real estate developers. The result is that the brightest minds are convinced that "success" means...

You’ve probably been there before, working hard on your job until your brain gets all mushy and fuzzy. But small breaks, like watching this video, can help you in multiple ways! Just, don’t fall into any cat video rabbit holes.

It's your first day at Magnificent Marigold's Magical Macademy. But before you can learn your first spell you must get through the sorting ceremony. And the sorting hat has chosen you for a special challenge. The Macademy had 8 founders...

Adam Savage makes things and builds experiments, and he uses costumes to add humor, color and clarity to the stories he tells. Tracing his lifelong love of costumes -- from a childhood space helmet made of an ice cream tub to a No-Face...