Category: Video Lessons

What Makes Muscles Grow
Health

What Makes Muscles Grow

We have over 600 muscles in our bodies that help bind us together, hold us up, and help us move. Your muscles also need your constant attention, because the way you treat them on a daily basis determines whether they will wither or grow.

How Stress Affects Your Body
Health

How Stress Affects Your Body

Our hard-wired stress response is designed to give us the quick burst of heightened alertness and energy needed to perform our best. But stress isn’t all good. When activated too long or too often, stress can damage virtually every part of our body.

Can You Solve the Submarine Riddle
Thinking, Learning, & Solving

Can you solve the rogue submarine riddle?

Smuggling yourself aboard the rogue submarine was the easy part. Hacking into the nuclear missile launch override was a little harder. However, now you have

The World's Most Painful Insect Sting
Nature of Science

The World’s Most Painful Insect Sting

One of these three creatures is thought to possess the world’s most painful insect sting: there’s an ant that forages in rainforest canopies, a bee that protects a hive of delectable honey, and a wasp that paralyzes tarantulas. So which has the nastiest sting? Justin Schmidt describes and ranks the pain inflicted by each insect.

How The Food You Eat Affects Your Brain
Health

How The Food You Eat Affects Your Brain

When it comes to what you bite, chew and swallow, your choices have a direct and long-lasting effect on the most powerful organ in your body: your brain. So which foods cause you to feel so tired after lunch? Or so restless at night? Mia Nacamulli takes you into the brain to find out.

Can You Outsmart A Troll?
Thinking, Learning, & Solving

Can You Outsmart A Troll?

Your town is holding a mayoral election and the stakes have never been higher. You suspect one of the candidates will begin pushing false information to swing the election. As the cybersecurity expert, your job is to inoculate the townspeople against false information. First, you must learn the strategies of disinformation trolls. Claire Wardle explores the tactics of disinformation campaigns.

What Would Happen If You Didn't Drink Water?
Health

What Would Happen If You Didn’t Drink Water?

Water is essentially everywhere in our world, and the average human is composed of between 55 and 60% water. So what role does water play in our bodies, and how much do we actually need to drink to stay healthy? Mia Nacamulli details the health benefits of hydration.

What Are Those Floaty Things In Your Eye?
Health

What Are Those Floaty Things In Your Eye?

Sometimes, against a uniform, bright background such as a clear sky or a blank computer screen, you might see things floating across your field of vision. What are these moving objects, and how are you seeing them? Michael Mauser explains the visual phenomenon that is floaters.

How To Improve Your Critical Thinking
Thinking, Learning, & Solving

How To Improve Your Critical Thinking

Socrates, one of the founding fathers of Western philosophical thought, was on trial. Many believed he was an enemy of the state, accusing the philosopher of corrupting the youth and refusing to recognize their gods. But Socrates wasn’t feared for claiming to have all the answers, but rather, for asking too many questions. Erick Wilberding digs into the technique known as the Socratic Method, which uses questions to examine a person’s values, principles, and beliefs.