NASA has been using swimming pools to train astronauts since the 1960s. The largest is the Neutral Buoyancy Laboratory (NBL), which holds roughly 9 olympic pools worth of water and has contained not just mockups of space station and...

Mercury, a.k.a. quicksilver, is famous for being a liquid at room temperature...and also below room temperature. But you can't use a high school chem class to explain why. Instead, we need a little help from Einstein.

Sometimes looking into a pool of a toxic liquid holds the secrets of the universe–or maybe just this one time.

We think we know how mountains form. Plate tectonics causes rock to be pushed up at fault boundaries. Except that model is hard to prove, and a new study suggests it might actually be a lot more complicated.

There’s a reason behind the saying “fish out water.” Fish don’t tend to do well if they’re not immersed in liquid. But walking catfish are surprisingly adept at making their way on land.

This week, Mike is teaching you about the most mythic of mythological creatures: Dragons. Cultures across the world (and across Westeros) tell stories of dragons, and their power to destroy, their power to prop up kings, and their power...

For many college students, living costs may exceed the cost of tuition and fees, as affordable housing options are becoming increasingly hard to find. Some find they struggle with debt, or paying for meals; others are at risk for...

It’s kind of a pain to get out of the pool just to use the bathroom, plus chlorine is a disinfectant so it is fine to pee in the pool, right? Well, it turns out that might give you some health issues.

For four billion years, what lived and died on earth depended on two principles: natural selection and random mutation. Then humans came along and changed everything - hybridizing plants, breeding animals, altering the environment and...

For upside-down mirrors, super hot volcanic chimneys, and neon rocks with living microorganisms, look no further than the Guaymas Basin in the Gulf of California.

Traveling is extremely arduous for microscopic sperm -- think of a human trying to swim in a pool made ofother humans. We can compare the journey of a sperm to that of a sperm whale by calculating the Reynolds number, a prediction of how...

Jumping into a refreshingly cold body of water on a hot summer day can feel wonderful, except for your nose. Why does it hurt so much when you get water up your nose?

You botched your forward double somersault and biffed it hard on the water. Why does it have to hurt so bad?

Alexa Meade takes an innovative approach to art. Not for her a life of sketching and stretching canvases. Instead, she selects a topic and then paints it--literally. She covers everything in a scene--people, chairs, food, you name it--in...

After nailing that sweet triple gainer into the pool you may have noticed something: being underwater is very peaceful, thanks to a reflex we share with all air-breathing vertebrates.

A freshly-mopped floor is slippery, but a wet shirt is super-clingy... so what's the deal? Why can water make some things slick and other things sticky?

There’s a reason behind the saying “fish out water.” Fish don’t tend to do well if they’re not immersed in liquid. But walking catfish are surprisingly adept at making their way on land.

You've felt cold before. Sometimes it's cold outside. But what if I told you that "cold" isn't real? There's no substance or quantity called "cold" in science. We can't measure the amount of "cold" in something. Instead it's about what's...

There's nothing better than going for a swim on a hot summer day! Sometimes, though, when you jump in the water, you might get a whole bunch of it up your nose! It's no fun, but why exactly does it hurt so much?

Abusing inhalants, like glue, can cause serious health problems, and you shouldn't need a video on the internet to tell you that. But let's take a deeper look at why these chemicals are so dangerous.

It's not just chlorine that irritates your eyes in a pool. It's actually something a lot more disgusting

Soaking in a hot tub is a great way to relax your tired body, but it also comes with some microbial risks.

In our final episode of Crash Course Sociology we are going to talk about what the health care system in the US looks like, the five A’s of health care accessibility, and a couple of contributing factors to the affordability of health...

A barometer is an instrument that measures air pressure, allowing weather forecasters and scientists to better predict extreme weather events. Despite its incredible usefulness, inventing the barometer was no walk in the park. Asaf...