Epigenetics: Why Inheritance Is Weirder Than We Thought

In this captivating talk, journey into the surprisingly colorful nights of the Amazon Rainforest, as artistic entomologist Leo Lanna and designer Lvcas Fiat introduce us to the shapeshifting wonder of a creature they've fallen in love...

Everyone is familiar with Twitter, the uber-popular micro-blogging site, which limits the user to 140 characters. The tweet is perfect for sharing your favorite links and updating the world about your life, but it might also be the...

People send 100 billion WhatsApp messages every day -- and they're all encrypted to protect them from potentially curious entities like companies, governments and even WhatsApp itself. With our increased reliance on digital communication...

In which John Green teaches you about Chinua Achebe's 1958 novel, Things Fall Apart. You'll learn about Igboland, a region in modern day Nigeria, prior to the arrival of the British Empire. Achebe tells the story of Okonkwo, an Igbo...

Ever call someone OCD because they like to have a clean apartment? Ever tell someone you have a phobia of spiders when, in fact, they just creep you out a little? In this episode of Crash Course psychology, Hank talks about...

You might thank your nose for letting you experience the lovely aromas of a good soup, but you probably wouldn't think to thank it for helping you experience other people's emotions!

This week on Crash Course Theater, Mike is acting like theater started in Greece. Well, for the western theater, this is true. The earliest recorded drama in the west arose in Athen, and these early plays grew out or religious ritual....

Exams can be terrifying. It's easy to feel like the weight of the world rests in these moments - like this one test determines your grades and, in turn, your whole future - even if you know, rationally, that this isn't really the case....

When stress got to be too much for TED Fellow Sangu Delle, he had to confront his own deep prejudice: that men shouldn't take care of their mental health. In a personal talk, Delle shares how he learned to handle anxiety in a society...

From a special black-footed ferret to coral that can withstand warming waters, genetic rescue efforts that use genomics and synthetic biology are helping nature thrive. But despite the huge successes of this kind of intervention,...

We’ve changed - and standardized - the way diseases get named because the old way was often stigmatizing and confusing.

Today we are talking about death, looking at philosophical approaches from Socrates, Epicurus, and Zhuangzi. We will consider whether it’s logical to fear your own death, or the deaths of your loved ones. Hank also discusses Thomas...

Why do teenagers sometimes make outrageous, risky choices? Do they suddenly become reckless, or are they just going through a natural phase? To find out, Kashfia Rahman -- winner of the Intel International Science and Engineering Fair...

Why are sounds scary? They're just vibrations. Blame your brain.

We all have emotions, but what exactly are they and where do they come from?

Wael Ghonim is the Google executive who helped jumpstart Egypt's democratic revolution ... with a Facebook page memorializing a victim of the regime's violence. Speaking at TEDxCairo, he tells the inside story of the past two months,...

Divisions along religious lines are deepening, and we're doubting more and more how much we have in common. How can we stand boldly and visibly together? Inspired by an idea from her collaborator Yazmany Arboleda, place-maker Nabila...

Activist and author Gloria Steinem is an icon of the global feminist movement. She's spent her life defying stereotypes, breaking social barriers and fighting for equality. In conversation with TEDWomen curator Pat Mitchell, Steinem...

Let's get Heroic with Mike Rugnetta. This week on Crash Course World Mythology, we're talking about the Hero's Journey and the Monomyth, as described by Joseph Campbell. Campbell's theories about the shared qualities of human story...

Throughout her life, Rosa Parks repeatedly challenged racial violence and the prejudiced systems protecting its perpetrators. Her refusal to move to the back of a segregated bus ignited a boycott that lasted 381 days and helped transform...

What trials unite not only Harry Potter or Frodo Baggins but many of literature's most interesting heroes? And what do ordinary people have in common with these literary heroes? Matthew Winkler takes us step-by-step through the crucial...

What makes a good horror story? Hideous monsters and fountains of blood might seem like a good place to start, but as horror author H.P. Lovecraft wrote, _The oldest and strongest kind of fear is fear of the unknown." Writers harness...

New Review‘We will suffocate’: Life behind Iran’s blackout as rare testimonies revealedMixed