05:49

Social Studies

What is hysteria, and why were so many women diagnosed with it?

Lesson duration 05:49

428,585 Views

09:45

Psychology

Why your phone is making you sad

Lesson duration 09:45

1,467,702 Views

05:27

Science & Technology

The birth of the galaxy in 60 seconds

Lesson duration 05:27

217,472 Views

05:33

Health

What’s the best way to treat the common cold?

Lesson duration 05:33

1,006,280 Views

12:24

Health

11 things that can change your eye color

Lesson duration 12:24

755,764 Views

04:48

Design, Engineering & Technology

The thing in your kitchen most likely to kill you

Lesson duration 04:48

272,506 Views

05:28

Science & Technology

How do animals regrow their limbs? And why can't humans do it?

Lesson duration 05:28

530,798 Views

05:38

Health

What does appendix pain feel like?

Lesson duration 05:38

1,145,227 Views

05:55

Science & Technology

The surprising reason zebras have stripes

Lesson duration 05:55

488,194 Views

04:56

Science & Technology

How space changes an astronaut’s body

Lesson duration 04:56

221,540 Views

04:41

Social Studies

The tale of the boy who tricked a tyrant

Lesson duration 04:41

394,598 Views

05:53

The Arts

The tragedy of the one guy who was right about the Trojan Horse

Lesson duration 05:53

437,535 Views

05:37

Science & Technology

Is this the most valuable thing in the ocean?

Lesson duration 05:37

444,522 Views

05:16

Design, Engineering & Technology

How do bulletproof vests work?

Lesson duration 05:16

319,700 Views

04:47

Health

Why is it so dangerous to step on a rusty nail?

Lesson duration 04:47

5,186,450 Views

05:14

Health

What are warts — and how do you get rid of them?

Lesson duration 05:14

504,070 Views

04:39

Science & Technology

The most dangerous elements on the periodic table

Lesson duration 04:39

572,825 Views

05:41

Social Studies

Why did people wear powdered wigs?

Lesson duration 05:41

781,386 Views

05:51

Health

Why is Alzheimer’s disease so difficult to treat?

Lesson duration 05:51

395,802 Views

06:45

Social Studies

What the oil industry doesn’t want you to know

Lesson duration 06:45

756,456 Views

04:19

Health

Why does hitting your funny bone feel so horrible?

Lesson duration 04:19

679,312 Views

05:29

Science & Technology

Why are scientists shooting mushrooms into space?

Lesson duration 05:29

657,967 Views

05:17

Science & Technology

The weirdest (and coolest) tongues in the animal kingdom

Lesson duration 05:17

251,367 Views

04:51

Social Studies

The fall of the House of Cadmus

Lesson duration 04:51

430,350 Views