Lessons Worth Sharing | Settings

You have JavaScript disabled
For the best experience, please turn JavaScript on. Here's how

Nutrition

What are those floaty things in your eye?

22,547,640 Views

Nutrition

What does the liver do?

3,112,908 Views

Health

How do the lungs work?

3,227,426 Views

Memory

The great brain debate

299,838 Views

Life Sciences

Why elephants never forget

8,881,116 Views

Life Sciences

How do scars form?

1,074,219 Views

Physical Science

How a wound heals itself

6,342,360 Views

Civics

How to understand power

3,652,323 Views

Speaking

The language of lying

21,630,203 Views

Mathematics

Is math discovered or invented?

3,223,727 Views

Science & Technology

Einstein's brilliant mistake: Entangled states

1,274,192 Views

Science & Technology

Schrödinger's cat: A thought experiment in quantum mechanics

8,630,553 Views

Science & Technology

Light seconds, light years, light centuries: How to measure extreme distances

3,517,743 Views

Physical Science

What is the Heisenberg Uncertainty Principle?

5,038,534 Views

Science & Technology

Particles and waves: The central mystery of quantum mechanics

1,095,338 Views

Physical Science

Two objects. Same room. Two different temperatures?

4,338,310 Views

Science & Technology

How the mantis shrimp can break glass

6,564,144 Views

Nature of Science

Can You Solve This?

15,983,271 Views

Environmental Science

The science of the Game of Thrones

1,744,036 Views

History

World War II: Why is it so important decades later?

11,357,435 Views

Cognition and Learning

Why we love repetition in music

1,087,561 Views

Earth and Space Science

What if the Earth stopped spinning?

21,280,845 Views

Consciousness, Sensation and Perception

What happens when you remove the hippocampus?

4,899,657 Views

Health

The past, present and future of the bubonic plague

1,696,559 Views