In part 2 of our special series on human ancestry, we ask why we are the only surviving branch on the human evolutionary tree. Just 50,000-100,000 years ago, Earth was home to three or four separate human species, including our most...

In which John Green teaches you about war! Specifically, John talks about whether humanity is naturally warlike, hard-wired to kill, or if perhaps war is a cultural construct. John will talk about the Hobbes versus Rousseau debate, the...

A trip into space produces physiological effects in human beings, but it can also change a person in a profound, psychological way.

Hank delves into the scientific reasons behind why we are attracted to the people we're attracted to. It's complicated.

It sure seems like some plants really don't want you hiking through their woods, but maybe your immune system is just overreacting.

Unfortunately, we don’t know how to cure hangovers yet. However, we DO know a lot more about how to make sure you wake up with a hangover. Avoiding some of these behaviors could help you feel better the morning after.

Evolution is a long, slow process - but sometimes, changes (often caused by humans) happen too quickly for a species to properly adjust. These scenarios are called evolutionary traps, and can lead species to make seemingly-illogical...

Animals have evolved a variety of ways to survive—including outright theft. Chapters SNEAKY SPIDERS 1:03 LYING BIRDS 2:43 3 CUCKOO BEES 5:18 MOUTH-PLUNDERING SNAILS 5:39 PLANT-ROBBING FLIES 7:12 MONKEY ROBBERS 8:40

Humanity has changed a lot since the days of our ancestral species, and we have continued evolution to look forward to as well.

Cognitive researcher Nancy Etcoff looks at happiness -- the ways we try to achieve and increase it, the way it's untethered to our real circumstances, and its surprising effect on our bodies.

Paul Andersen reflects on Digital Aristotle, his trip to the YouTube Edu summit, and the future of education

Is a universal translator possible in real life? We already have many programs that claim to be able to take a word, sentence, or entire book in one language and translate it into almost any other. The reality, however, is a bit more...

Theoretical physicist David Deutsch delivers a mind-bending meditation on the "great monotony" -- the idea that nothing novel has appeared in the universe for billions of years -- and shows how humanity's capacity to create explanatory...

They're probably the most successful birds in the history of birds. But what do you really know about pigeons? Hank shares three weird facts about the birds, from their amazing chick-raising trick to their history of heroism in wartime.

You may have seen posts online warning you about the dangers of eating burnt toast, but how much will that actually affect your health?

Many people assume that fish are less intelligent than mammals, but it turns out that isn’t true at all - they are actually way smarter than you probably give them credit for.

We can't know if or how animals understand death, but behavioral changes in some species could mean they experience something similar to human grief.

explore a speculative digital world without screens in this fanciful demo, a mix of near reality and far-future possibility. Wearing the HoloLens headset, Alex Kipman demos his vision for bringing 3D holograms into the real world,...

Google's 'AlphaGo' and the world's top ranked Go player go head-to-head in a battle to decide whether or not an AI can be programmed to win a game as complicated as Go.

In this collection of classic MinuteEarth videos, we learn that for pretty much every action we humans take, there’s an unintended consequence we didn’t see coming.

We've all seen the movies and heard the hype: But is it really possible to bring back animals that have gone extinct? If so, how? And how soon? And can I have a mammoth to ride around in my backyard? Hank explains the latest research...

Just like us, the monarch butterfly sometimes gets sick thanks to a nasty parasite. But biologist Jaap de Roode noticed something interesting about the butterflies he was studying — infected female butterflies would choose to lay their...

There is a chemical so bitter you can taste it in an Olympic-sized swimming pool and you probably have it in your home without even knowing it.

Ukraine is on the front line of a war between freedom and tyranny, says chess grandmaster and human rights advocate Garry Kasparov. In this blistering call to action, he traces Vladimir Putin's rise to power and details his own path from...