SciShow
Why Does Rubbing Tired Eyes Feel Good?
It can be a wonderful feeling to give your tired eyes a good rub. And rubbing your eyes can help keep them moist, but it turns out it also can affect your heart rate.
SciShow
Why Is Being Underwater So Peaceful?
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.
TED-Ed
TED-Ed: How do cigarettes affect the body? - Krishna Sudhir
Cigarettes aren't good for us. That's hardly news -- we've known about the dangers of smoking for decades. But how exactly do cigarettes harm us, and can our bodies recover if we stop? Krishna Sudhir details what happens when we smoke --...
SciShow
Why Do You Feel Butterflies in Your Stomach
It may have happened when you locked eyes with your secret crush, or before an important job interview, but what exactly caused that strange, fluttering sensation in your stomach?
SciShow
Bath Salts
Hank talks about the scary new drug that's led to some recent incidences of goat stabbing, as well as other tragedies - bath salts. We learn how it works and ask the important question: why?
SciShow
Why Do We Stretch in the Morning?
Humans (and our pets) frequently instinctively stretch as soon as we wake up. But why? What is happening in our bodies when we stretch and yawn to wake ourselves up?
TED-Ed
TED-Ed: The psychology of post-traumatic stress disorder - Joelle Maletis
Many of us will experience some kind of trauma during our lifetime. Sometimes, we escape with no long-term effects. But for millions of people, those experiences linger, causing symptoms like flashbacks, nightmares, and negative thoughts...
Crash Course
Blood Vessels, part 2: Crash Course A&P
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 dealing with...
SciShow
How AI Can Save Lives | SciShow Compilation
Artificial intelligence is rapidly becoming an integral part of our everyday lives. Here’s a number of ways in which it manages to make life better for us humans.
Amoeba Sisters
Nervous System
Join the Amoeba Sisters on this introduction to the Nervous System! This video briefly describes the division of the central nervous system (including going over some general areas of the brain) and the peripheral nervous system before...
SciShow
Why Do I Feel Lightheaded When I Stand Up?
Have you ever stood up and felt a bit dizzy and lightheaded? Learn why it happens in this SciShow Quick Question!
TED-Ed
TED-Ed: How high altitude affects your body | Andrew Lovering
If you teleported from sea level to the top of Mount Everest, things would go bad fast. At an altitude of 8,848 meters, you would likely suffocate in minutes. However, for people that make this journey over the course of a month, it's...
Crash Course
Great Glands - Your Endocrine System: CrashCourse Biology
Hank fills us in on the endocrine system - the system of glands which produce and secrete different types of hormones directly into the bloodstream to regulate the body's growth, metabolism, and sexual development & function.
SciShow
Do You Have a Maximum Heart Rate?
Does your heart rate have an upper limit and could you ever reach it?
Crash Course
The Nervous System - CrashCourse Biology
Hank begins a series of videos on organ systems with a look at the nervous system and all of the things that it is responsible for in the body.
Curated Video
What Is the Best Aerobic Exercise for Women?
Howcast - Learn what the best aerobic exercise is from personal trainer Erin Sharoni in this Howcast workout video.
Curated Video
How to Do Mountain Climbers for a Female Leg Workout
Howcast - Learn how to do mountain climbers for a female leg workout from personal trainer Erin Sharoni in this Howcast workout video.
Curated Video
How to Do a Mountain Climber for a Bikini Workout
Howcast - Learn how to do mountain climbers for a bikini workout from personal trainer Erin Sharoni in this Howcast workout video.
Curated Video
How to Do the Quick Feet Dance Move
Howcast - Learn how to do the quick feet dance move from fitness expert Rachel Warren in this hip-hop dance workout video from Howcast.
Curated Video
How to Warm Up for a Bike Race
Howcast - Learn how to warm up for a bike race from racer Alexander Barouh in this Howcast road cycling video.
Curated Video
How to Do a Skater for a Sexy Legs Workout
Howcast - Learn how to do skaters from personal trainer Mindi Smith in this Howcast sexy legs workout video.
Curated Video
Psychological Effects of Marijuana
Howcast - Learn about the psychological effects of marijuana use in this Howcast video.
Curated Video
How to Do a Bosu Ball Knee-Repeater Exercise
Howcast - Learn how to do a bosu ball knee-repeater exercise from personal trainer Rachel Shasha in this exercise ball workout video from Howcast.
Curated Video
What Are the Best Bosu Ball Workouts?
Howcast - Learn the best workouts you can do with a bosu ball from personal trainer Rachel Shasha in this exercise ball workout video from Howcast.