Bozeman Science
The Endocrine System
Paul Andersen explains the major elements in the endocrine system. He explains how glands produce hormones which target cells. He differentiates between water soluble and lipid soluble hormones. He then describes the hormones and actions...
SciShow
You Have Four Ages
A person's chronological age doesn't tell us much about the health of their body's various systems. That's why scientists are beginning to study biological ages, and it turns out there may be a lot of them.
SciShow
How We Get Sick in Space and How to Recover | Compilation
No one likes being sick, but can you imagine catching a bug while hurling through space? Turns out, this is an issue that many space agencies have worked to study and mitigate.
PBS
How the Smallest Animal Got So Simple
We tend to think that evolution only goes in one direction— toward getting bigger and more advanced. But that’s not always the case. This tiny, simple animal, the Myxozoans, (yes, animal!) evolved from something bigger and more complex.
Be Smart
How Your Brain Makes Its Own Electricity
Here’s a thought: What IS a thought? I know it involves my brain, and my brain is made of neurons. And my brain’s neurons are listening to other neurons all over my body. But how do those neurons actually work? Maybe you’ve heard that it...
SciShow
How Does Chickenpox Turn Into Shingles?
You might know that chickenpox and shingles are both caused by the same virus, varicella zoster. Here's why the symptoms, and even the vaccines, are different the second time around.
SciShow
The Crabs That Revolutionized Neuroscience
We used to think neural circuits were rigid and robotic, but now we know that's not true -- thanks to crab stomachs.
SciShow
Can Sponges “Think” Using Light?
Sponges might not look like particularly complex animals, but they've had billions of years to evolve their own special systems. And one of those systems might involve sending messages through their body in the form of light.
SciShow
This Neuron Helps People Walk Again | SciShow News
There’s been some big news in neuron science this week as individuals suffering paralysis regain mobility and music might have a secret that gets us to dance.
SciShow
Could a Shirt Hear Your Heartbeat? | SciShow News
Microphones keep getting smaller and smaller, but have you ever asked what it would be like to have a bigger one in the form of a shirt? And though we tend to incorrectly think that we’re having two-way conversations with our pets, we...
SciShow
We Finally Know How Anesthesia Works
Even though doctors have been using general anesthesia for nearly 200 years, they haven’t really understood the details of how it temporarily shuts down your brain — until now.
SciShow
How Does Cold Medicine Work?
The cold medicine you picked up at the store involves some cool chemistry to treat your symptoms. *Correction: This episode was written by Alison Caldwell.
SciShow
Yet More Evidence That Vaping Is Probably Terrible | SciShow News
Did you know that your body's fight-or-flight response to danger may, in part, come from inside your bones? Plus, another study suggests that vaping may impair to your ability to fight off lung infections.
SciShow
What Drugging Animals Is Teaching Scientists
Drugging animals may seem like a bad idea, but you'd be shocked to learn what it can teach scientists about disease, biology & animal behavior! Join us for a new animal-focused episode of SciShow, hosted by the one and only Hank Green!
SciShow
Do You Have a Maximum Heart Rate?
Does your heart rate have an upper limit and could you ever reach it?
SciShow
Hacking the Brain: The Future of Prosthetics
We usually think of 'hacking' as a bad thing, but scientists are working on ways to hack the brain that will greatly benefit people with prosthetics, and maybe someday people with paralysis.
SciShow
What Happens When You Faint?
Why do we faint? Because sometimes, your nervous system just doesn’t know what to do with itself.
SciShow
New Channel Alert!
It was recently brought to our attention that there's a category here that we have covered quite a lot, and that people have… watched. Here's a selection of our absolute favorite SciShow Pee episodes!
SciShow
Migraines: Not Just Another Headache
If you've never had a migraine, you might think it's just a really bad headache. But if you've ever had them, or you know someone who does, you know that they're much worse -- and much more complicated -- than that. Hank explains the...
SciShow
Why You Think Your Phone Just Buzzed
Have you ever thought you felt your phone vibrate, only to pull it out of your pocket and find that you have no new notifications? If so, you've experienced 'phantom vibration syndrome.' But what causes these mystery sensations, and are...
SciShow
Why Do We Wrinkle When Wet?
Why do your fingers and toes get wrinkly when they’ve been in the water too long? Short answer: Your nerves. Longer answer: Evolution.
TED-Ed
TED-Ed: What would happen if you lost your sense of touch? | Antonio Cataldo
We don't often think of touch as being a vital part of movement, but touch is one part of a network that oversees all the sensations arising from the surface and interior of our bodies. Touch, pain, temperature, and our spatial awareness...
Crash Course
Meet Your Master: Getting to Know Your Brain - Crash Course Psychology
In this episode of Crash Course Psychology, we get to meet the brain. Hank talks us through the Central Nervous System, the ancestral structures of the brain, the limbic system, and new structures of the brain. Plus, what does Phineas...
SciShow
What’s In Your Brain? | Compilation
Ever stop to ponder how your brain ponders its own complexities? How does it know to tell your limbs to stop moving and have a think? Fear not, because we have answers to many questions about those wrinkly sponges!