Mushrooms can be pretty weird! Some have the power to trick animals into caring for them, appear to bleed, or even clean up radiation!

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On the 4th of July, Americans like to celebrate the things that make the United States unique, and a lot of those things have to do with our geography. That remarkable geography is also responsible for some pretty unique weather, and...

SciShow explains how three important ingredients -- sunlight, water, and you -- interact to create the illusion of a rainbow. The colorful details are inside!

SciShow explores a newly identified neurological condition, aphantasia, the inability to visualize things in your imagination, and gives tribute to Dr. Oliver Sacks, popular explorer of the human mind.

In the Zagros Mountains of Iran lie some strange, multi-colored glaciers that don’t melt, even in the heat of summer. But, in a rainstorm, these glaciers will start to dissolve away.

Is there extraterrestrial life in our solar system? Or are we alone? Take a journey to the ocean worlds on Jupiter and Saturn to investigate the possibility. -- Deep in our solar system, a new era of exploration is unfolding. Beneath...

What makes crystals grow into their signature shapes? Dig into the atomic patterns and unique properties of crystals. -- Many crystals have signature shapes— like the cascade of pointed quartz or a pile of galena cubes. Every...

There are genetic mutations in the population today that can grant people some seemingly superhuman abilities.

Phil takes us for a closer (eye safe!) look at the two-octillion ton star that rules our solar system. We look at the sun's core, plasma, magnetic fields, sunspots, solar flares, coronal mass ejections, and what all of that means for our...

Our final unit of Crash Course Sociology is medical sociology. Today we’ll explain what it is and get an overview of the role of society in our notions of health and disease.

It's the end of this first year of Crash Course Kids and we've learned so many things. In this episode, Sabrina takes us on a tour of some of the ideas we've talked about and how they fit into our lives. Also, what all of these ideas...

Mars might be full of salty liquid water! Plus, a guide to the upcoming Lyrids meteor shower.

In which John Green, Hank Green, and Emily Graslie teach you about our Sun, and the formation of the planets. We're going to focus on the formation and development of the Earth, because that's where people live. You'll learn about the...

Beer & Biodiversity

From 2016 to 2019, the world saw record-breaking heat waves, rampant wildfires, and the longest run of category 5 tropical cyclones on record. The number of extreme weather events has been increasing for the last 40 years, and current...

New ReviewIn chemistry, STP is a commonly used abbreviation, and this video explains what STP stands for. We dive into how it relates to the kinetic molecular theory and gas laws. Learn about standard temperature and pressure, and why scientists...

New Review“Animals in Deserts” explores plants and animals that live in deserts.

Antibiotics are one of the greatest medical innovations ever, responsible for saving something like a gazillion lives. But today, we're worried about overusing them, and there are concerns that one day they won't really work anymore....

Though you may not have realized it, there's a good chance that a doctor has prescribed you a medication for a use other than what it was approved for. This off-label use is perfectly legal, but isn't as safe as it might be, in part...

Senate Republicans are going to give it one more try on repealing and replacing Obamacare. This week, Senators Bill Cassidy (LA) and Lindsey Graham (SC) plan to bring forward a bill to repeal and replace the Afffordable Care Act. It's...

In previous episodes of Healthcare Triage, we've discussed how people often misunderstand risk and how it affects them. We've also talked about how you can calculate the explicit metrics of numbers needed to treat and harm. But people...

In this lesson, we will understand what a firewall is and how it functions to protect our computer systems and networks.

Learn how mercury barometers measure atmospheric pressure and how U-tube manometers are used to calculate gauge pressure in gases using the ρgh equation.

This instructional video introduces viewers to the concept of Creative Commons licenses and explains how they offer flexibility in using copyrighted material. The video highlights how creators can share their images, music, films, and...