In which Mike Rugnetta teaches you about Ma'ui, prominent hero of many cultures in Oceania, aka the Pacific Island nations. Ma'ui is just the kind of hero we're interested in here at Crash Course. He's a culture hero, he's a an...

For social media creator and viral video hitmaker Jenny Hoyos, the key to telling a great story is to keep it brief. She breaks down her framework for telling stories in 60 seconds or less that can gain millions of views online — or...

Because of the way digestion works, human poop not only contains dangerous microbes, it also contains a wide variety of other things, many of which we could potentially put to use.

Relativity Isn't Relative

What is a sport? Do arbitrary and technophobic rules matter?

Is it Better to Walk or Run in the Rain

How to Build a Better City

This video is about the orbital mechanics of why it's so hard to crash into the sun - the energy it takes to get there is astoundingly high, compared with leaving the solar system.

Einstein didn't like quantum mechanics because it wasn't able to make perfect predictions... but science is not about what you like, it's about what's true!

Guns in Space

This video is about gravitational waves in the weak field limit as discovered by the LIGO collaboration, explained by parallels to electromagnetic radiation, sound waves, water waves, etc. I want to see Cat LIGO ASAP!

In the past decade, astronomers have discovered interstellar objects, including a 2014 meteor that collided with Earth and 'Oumuamua in 2017. These objects, moving too fast to be bound by the Sun's gravity, have sparked questions about...

Squeaks and Jessi are learning all about the animals that live at the bottom of the world, including penguins - emperor penguins, macaroni penguins, and more! We learn why penguins look like they're all dressed up, and what kind of food...

Antarctica is the coldest place on Earth, but there's still a lot to explore, on land and under the waves!

Jessi and Squeaks explore two of the windiest places on Earth: Mount Washington in New Hampshire, USA, and Commonwealth Bay, Antarctica.

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...

Scientists have recently discovered the cells responsible for a deer's amazing ability to regrow antlers in just a few months. It may be the key to healing human wounds and broken bones faster.

Almost 50 million years ago, the biggest landslide in Earth's history occurred in Wyoming. An entire mountain slid 45 kilometers at one-third the speed of sound. But how could this happen when the slope was only 2 degrees?

We can get to Mars in 3 days, . . .sort of, maybe. In this episode of SciShow Space Reid Reimers explains the possibilities of photonic propulsion in use with space travel.

The world relies on manufacturing, and manufacturing relies on heat — a massive contributor to global carbon emissions, responsible for a quarter of the world's fossil fuel use. Energy entrepreneur John O'Donnell has figured out a...

The universe is expanding – this we know from looking at red shifts of distant galaxies – but the acceleration of the universe's expansion is harder to measure. It requires measuring the change of recession velocity over time, and it's...

It’s not just how much you take in; it’s how fast your body can purge it.

Even if we find an earth-sized exoplanet, how can we be so sure that we're looking at earth 2.0? It might come down to how fast it's spinning.

As we wrap up 2022, we'd like to celebrate a few of the cosmic “winners” discovered this year, at least while they still hold their titles.