After drinking a few glasses of water on a hot day, you might be struck with a sudden urge. Behind that feeling are two bean-shaped organs that work as fine-tuned internal sensors. Emma Bryce details how the incredible kidneys balance...

You might think you know how to survive if you end up stranded in the wild, but those tips you read on the internet might just make things worse!

Some tips seem too good to be true, and they are. Others are ingrained...

Explore inheritance when carried on the X chromosome with the Amoeba Sisters! This video focuses on how to do general Punnett square problems that involve traits on the sex chromosomes (X and Y chromosomes). We do want to point out...

Everybody knows what anxiety feels like - it's annoying and counterproductive and apparently useless, so why does it exist? It turns out your anxiety isn't useless at all - it's a result of the sympathetic nervous system (in charge of...

We need an inside-out approach to how we diagnose disease, says immuno-engineer and TED Fellow Aaron Morris. Introducing cutting-edge medical research, he unveils implantable technology that gives real-time, continuous analysis of a...

Spicy food is delicious, but how does it affect our health?

There's a play so powerful that an old superstition says its name should never be uttered in a theater. A play that begins with witchcraft and ends with a bloody, severed head. A play filled with riddles, prophecies, nightmare visions,...

If we hope to someday live on other worlds we need to figure out where we’re gonna lay our heads at “night.” But who would have thought we could use our own bodies as ingredients for our homes?!

"The bends" is one of the biggest risks that humans have to deal with when diving, but why don't marine animals, which are diving all the time, get them?

You’re probably aware that your blood can be A, B, AB or O, but it turns out that blood types can get a lot more complicated than that!

Humans are the only animals known to faint due to triggers like shock, fear, or pain; this is due to a combination of our massive brains and upright stance.

Paul Andersen explains how hugs between tissues can help maintain homeostasis. Countercurrent heat exchange allows heat to stay within the core of the body. Close contacts between the capillaries and alveoli allow our body to maintain...

Crocodiles have four-chambered hearts, just like we do! But, while our hearts do just fine with four valves, they have a slightly different approach…

Dr. Genevieve Lind explains how she uses frog eggs to learn how drugs affect receptors in the brain and Jessi's chicken Goldie shows us one use for the cloaca.

The pee you just flushed without thinking could be a great sample to know what is going on in your body!

And now we return to blood vessels. In this episode, we start discussing what blood pressure is, how it can become "high", and what that means for our health. One of the more interesting points is that your body has ways of...

How worried should you be when your urine isn't yellow, but instead it's green, red, or even black?

Have you ever heard that you become more powerful in life-or-death situations? There are a lot of anecdotes about super strength, but is it a real thing?

If you've ever been pregnant, or been around a pregnant lady, you know that the agony that is morning sickness -- and it's not just something that happens in the morning! SciShow explains the many theories about what causes it.

You've probably been told that eating too much salt is bad for you, especially if you have high blood pressure. But what exactly does salt do to our bodies that can make it so hard on our hearts?

Studies have found that even some of the most well-known home remedies don’t work, and sometimes they do more harm than good. Chapters HONEY FOR ALLERGIES BUTTER ON THERMAL BURNS 2:15 VINEGAR FOR HEAD LICE 4:42 4 IPECAC FOR POISONING...

Our bones are multi-functional body builders, but perhaps their most mysterious function is the production of blood. Scientists now think they have a pretty good idea why this is where our blood gets made.

You might think your grandma who wakes up at 4am just needs less sleep than younger people. Not so! Studies suggest there are some bizarre reasons older people rise at the crack of dawn, including something called brain sand!

How is it possible for air-breathing marine mammals like sperm whales and elephant seals to hold their breath for so long?