Detecting diseases early can be a big help when it comes to treating them, and researchers may have gotten one step closer to diagnosing Alzheimer's with a simple blood test.

If you've heard it once, you've heard it a thousand times: Parents blaming their kids' active behavior on sugar. But is it true? Hank gives you sweet-and-lowdown on the extent to which sugar can and can't affect behavior, in kids and...

Welcome back to SciShow Quiz Show! Katelyn Salem of Kate Tectonics competes against Googleable internet sensation, Hank Green.

Usually, the 160,000 kilometers of blood vessels in your body work incredibly smoothly. However, the forces of age, weight gain, and gravity can conspire to cause lumpy varicose veins.

Throughout history, people have been trying to figure out how our bodies work and how to fix them when things go wrong. This has led to some ideas that, with the benefit of hindsight, seem very strange

When you're sick you just want to be left alone. Sometimes that's because you physically can't move, but other times, it might have more to do with the way your immune system is connected to your brain.

Would you rather be bitten by a venomous rattlesnake or touch a poisonous dart frog? While both of these animals are capable of doing some serious damage to the human body, they deliver their dangerous toxins in different ways. Rose...

Sensory deprivation tanks, oxygen therapy chambers and unbelievably cold saunas - oh my! These machines are used to reduce stress, ease pain and could be useful in doing that, but these machines are generally meant to be used in very...

In 1881, doctor William Halsted rushed to help his sister Minnie, who was hemorrhaging after childbirth. He quickly inserted a needle into his arm, withdrew his own blood, and transferred it to her. After a few uncertain minutes, she...

As if you needed any more proof that alcohol just makes weird stuff happen, Quick Questions explains why alcohol can make you /feel/ warm, when it's actually making your body colder. You'll never think of brandy the same way again!

Learn about the Greek physician and philosopher Galen of Pergamon, whose experiments and discoveries changed medicine. -- In the 16th century, an anatomist named Andreas Vesalius made a shocking discovery: the most famous human anatomy...

Tony Wyss-Coray studies the impact of aging on the human body and brain. In this eye-opening talk, he shares new research from his Stanford lab and other teams which shows that a solution for some of the less great aspects of old age...

When radium was first discovered, its luminous green color inspired people to add it into beauty products and jewelry. It wasn't until much later that we realized that radium's harmful effects outweighed its visual benefits....

If you're like us, you love the sound of a brunch buffet. But not everything you eat at that glorious buffet is going to be turned into energy. Your body has to work with different forms of food in different ways. In this episode...

Hank answers a SciShow viewer's most pressing question about what happens if the human body gets exposed to space. Would your head really explode?

The little fish Danio rerio holds secrets to understanding how vertebrates develop, how diseases like cancer work, and how we might one day learn how to regenerate human heart tissue.

There’s a lot we just don’t know about death, but even among the things we think we do know, there are a lot of misconceptions. Here are 5 weird things we believe about death!

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Two SciShow hosts go head-to-head in a battle to figure out who will be the reigning champion for this era of SciShow Quiz Show!

Sunning themselves on rocks or waddling awkwardly across the beach, it's easy to think of sea lions more as sea house cats. But don't be fooled by their beachside behavior. Under the waves, sea lions are incredible endurance hunters,...

SciShow’s Executive producer Hank Green faces off against SciShow senior editor Alyssa Lerner in this Quiz Show about weird experiments and strange animal parts.

Sometimes, the common names we use for things are really confusing! Here are 8 living things with terrible names!

Hank tries not to stress you out too much as he delves into the functions and terminology of your sympathetic nervous system.


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What's the best sleeping position? Well, with all the pseudoscience to consider, it might just depend on who you are. *The graphic shows the stomach on the wrong side of the body. It should be pictured on the left side of the body, not...

Scientists are looking for a new way to make antivenom and a new study poked some holes in a diagnostic test by making volunteers drink their own blood.