For thousands of years, water was thought to be an element. That is, until some of the greatest chemists in the world managed to crack it open.

By overcounting how much carbon their forests suck up, and undercounting how much carbon their industries release, countries undercount their total carbon emissions.

This video is about a better way to understand Penrose tilings (the famous tilings invented by Roger Penrose that never repeat themselves but still have some kind of order/pattern).

One Minute Physics provides an energetic and entertaining view of old and new problems in physics -- all in one minute!

One Minute Physics provides an energetic and entertaining view of old and new problems in physics -- all in one minute!

So today Craig is going to look at political ideology in America. We're going to focus on liberals and conservatives and talk about the influencers of both of these viewpoints. Now, it's important to remember that political ideologies...

What if, no matter how strong your password was, a hacker could crack it just as easily as you can type it? In fact, what if all sorts of puzzles we thought were hard turned out to be easy? Mathematicians call this problem P vs. NP, it...

Scientists have developed a new AI that can teach itself how to be the master of an ancient board game.

Hank introduces us to the most beautiful numbers in nature - the Fibonacci sequence.

Have you ever wondered why 75% humidity in the summer feels sticky, but 75% humidity in the winter feels super dry? Turns out, the common definition of humidity is inconvenient and confusing. But there is a better way!

It’s been a pretty cool year for science around the globe, and we here at SciShow like to highlight the superlatives: some of the biggest, oldest, fastest, and most amazing discoveries of 2016.

While children are only a small minority of those who test positive for COVID-19, we’re starting to see evidence of a rare, but serious, complication in children that resembles a condition known as Kawasaki disease. Here’s what doctors...

Some people have more taste buds than the rest of us. They’re called supertasters, and they can taste things others can’t. Special thanks to our tasters: Matthew Gaydos Lindsey Doe Julia Maes Hank Green

You may have heard about the Six Degrees of Separation phenomenon, but it isn't just a fun celebrity game, it helps scientists understand the spread of epidemics, the structure of the internet, and even the neural networks in your brain!

As we react to the predictions that epidemiological models make, changing the ways we act and go about our lives, those estimates can appear totally off. But if a model’s predictions end up being wrong, that might mean it's done exactly...

Why do exams always tell you to use a number 2 pencil? What happens if you don’t? Quick Questions explains!

If, for some wild reason, we decided that breeding humongous spiders was a good idea, could we actually pull it off?

In elections, your vote may be influenced by design of the ballot itself, especially when you don’t have strong feelings about which candidate to elect.

6 Surprising Blood-Drinking Animals

Hank gives us the top 5 scientifically documented reasons why breastfeeding is awesome - for both mom and baby.

Devastating vulnerabilities are hiding in the technology in programs, protocols, and hardware all around us. Most of the time, you can find ways to protect yourself.

There are lots of unsolved mysteries in the world of math, and many of them start off with a deceptively simple premise, like: What's the biggest couch you can slide around a 90-degree corner? Hosted by: Michael Aranda

Fossils can provide clues to the conditions that ancient species lived in, like what their environments felt like, how deep in the water some species lived, or even how long the Sun was out!

When birds and squirrels cache food for the winter, it means they have to remember where to find that food later. Their strategies for finding their hidden feasts includes memory tricks and changing brains.