You've probably heard of cancers having stages, but what do all those stages really mean? This video is a 101 to explain cancer diagnosis and decode the jargon for you. And even if you've heard of the numerical stages, you might not know...

In 2017, astronomers discovered 'Oumuamua — the first definitive interstellar visitor to our solar system. But definitive evidence of space rocks that don't just visit but join our solar system is a little more elusive.

There's a group trying to save the functionally extinct northern white rhino using in vitro fertilization. But the ethics around using assisted reproductive technologies to save endangered animals are far from simple.

*At the time this video was made, it had been reported that Charlotte the round ray was pregnant. However, new information has come out that she was never pregnant with parthenotes, and in fact had a reproductive disorder, which is a...

You'd think that there are some features that, once an animal group evolved to have them, could never really go away, right? Well, Stefan is joined today by hosts from PBS Eons, Journey To The Microcosmos, and Bizarre Beasts to break...

Your optometrist can tell you if you're at risk for cardiovascular disease, Alzheimer's, or diabetes. And it's all thanks to James Bond-style retinal scanners.

For some people who stop taking an SSRI or SNRI antidepressant, they can get a weird side effect called brain zaps. And even though we've known about them for decades, we still don't know exactly why brain zaps happen.

For transgender and nonbinary people, hormone replacement therapy has become one of the standards of care. But what is it, exactly? And what can people receiving the therapy expect? SciShow has the answers.

The same technology that helps you rack up kills in your favorite FPS games also helps paleontologists solve million-year-old mysteries. Thanks to Dr. Anne Kort for helping us with this video!

So, rocks are hard. But the scale we use to rank them, the Mohs scale, is only really good at quantifying that for one kind of hardness, and topaz is a perfect stone to talk about to explain that. And you can check it out in our SciShow...

Whether you grew up with a poster of the solar system on your bedroom wall or not, you've probably got a specific idea of what the planets look like. From brilliantly blue Neptune to the "red planet" Mars. But if you managed to actually...

The Milky Way is often described as measuring 100,000 light years across and containing the mass of a trillion Suns. But our home galaxy is actually far bigger, and might be much less massive. Astronomers aren't sure what the exact stats...

This is a snippet of a larger conversation taking place on Crash Course Pods: The Universe. Over 11 episodes, John Green and Katie Mack walk through the entire history of the universe…even the parts that aren’t written yet. <b<br/>r/>

Prosopometamorphopsia is an extremely rare disorder of facial processing that makes other people's faces look demonic or seem to melt. But in the process of treating these people, we can also learn how our brain understands what a face...

If you could throw a potluck with all the oldest foods in the world, what would you bring? We asked ourselves that question and prepared a menu of tasty snacks for you to consider, from tamales and noodles to our favorite ancient boozes....

When it comes to a beverage menu, I don't usually want to see "tears" on the list. But these three animals do, including bees whose favorite drink is human tears!

SciShow News explains the forces at work behind the earthquake in Nepal, introduces you to a new species of dinosaur, and reveals a discovery in Antarctica.

How can you effectively support people at work and in your community, especially when they're different from you? Inclusion strategist Amber Cabral shares three steps you can take to build connection — emphasizing that even small,...

On paper, law professor Samar Ali and public affairs strategist Clint Brewer seem to come from very different — and perhaps opposing — backgrounds. But their friendship shows why political polarization in the US isn't as intractable as...

After years of brand building, marketing veteran Sylvester Chauke realized that his industry had sold the world on overconsumption, with devastating consequences. He shares how marketers could instead promote sustainability with "honest...

What would happen to humanity if generosity went viral? Sharing transformative stories from around the world, head of TED Chris Anderson outlines why the time has come for the internet to realize its power to supercharge small acts of...

Instead of seeing life's challenges as obstacles, I see them as an obstacle course — a fascinating array of tests that I'm curious to see if I can pass, says community builder Maryam Banikarim. Telling the story of her experience...

At work, the dreamers often get credit for the big ideas, but they can also sometimes seem untethered to reality to the doers, who are trying to ... get things done. It's when these two types of humans work in harmony that business magic...

Legendary actor and mental health advocate Glenn Close is on a quest to change how we think about mental health, starting with her decision to speak out about her own family's struggles — a brave choice considering the stigma that...