10:07

Health

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10:48

Health

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05:00

Psychology

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Lesson duration 05:00

392,061 Views

06:48

Health

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Lesson duration 06:48

601,750 Views

05:52

Social Studies

The history of the world according to rats

Lesson duration 05:52

319,603 Views

06:31

Health

One of the most controversial medical procedures in history

Lesson duration 06:31

484,244 Views

05:26

Health

Do you really need to take 10,000 steps a day?

Lesson duration 05:26

5,172,002 Views

04:59

Psychology

How some friendships last — and others don’t

Lesson duration 04:59

832,893 Views

05:18

Health

How does kidney transplant surgery work?

Lesson duration 05:18

227,410 Views

06:35

Health

The real reason polio is so dangerous

Lesson duration 06:35

531,878 Views

06:06

Science & Technology

How do heat waves affect your body?

Lesson duration 06:06

475,428 Views

05:20

Health

3 reasons why medications are so expensive in the US

Lesson duration 05:20

197,244 Views

05:37

Science & Technology

This mushroom will kill you before you know what’s happening

Lesson duration 05:37

848,083 Views

05:49

Social Studies

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

Lesson duration 05:49

413,891 Views

05:33

Health

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

Lesson duration 05:33

976,215 Views

12:24

Health

11 things that can change your eye color

Lesson duration 12:24

750,858 Views

04:48

Design, Engineering & Technology

The thing in your kitchen most likely to kill you

Lesson duration 04:48

266,326 Views

05:28

Science & Technology

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

Lesson duration 05:28

521,369 Views

05:38

Health

What does appendix pain feel like?

Lesson duration 05:38

1,089,812 Views

04:47

Health

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

Lesson duration 04:47

4,821,765 Views

05:14

Health

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

Lesson duration 05:14

480,557 Views

05:51

Health

Why is Alzheimer’s disease so difficult to treat?

Lesson duration 05:51

377,129 Views

05:43

Health

What happens in your body during a miscarriage?

Lesson duration 05:43

595,388 Views

05:29

Health

How do doctors determine what stage of cancer you have?

Lesson duration 05:29

641,194 Views