05:09

Mathematics

Can you solve the alien probe riddle?

Lesson duration 05:09

2,517,001 Views

17:05

Mathematics

Math is the hidden secret to understanding the world - Roger Antonsen

Lesson duration 17:05

1,857,373 Views

04:58

Teaching & Education

Why perfect grades don't matter

Lesson duration 04:58

4,449,208 Views

05:11

Science & Technology

Could the Earth be swallowed by a black hole?

Lesson duration 05:11

1,021,680 Views

06:48

Science & Technology

Is height all in your genes?

Lesson duration 06:48

4,338,899 Views

04:56

Literature & Language

Why should you read Edgar Allan Poe?

Lesson duration 04:56

2,312,430 Views

03:33

Physical Science

Why 350°F is the magic number for baking

Lesson duration 03:33

1,299,600 Views

05:22

Science & Technology

What would happen if every human suddenly disappeared?

Lesson duration 05:22

5,002,183 Views

03:31

Earth and Space Science

The tallest lifeforms of all time

Lesson duration 03:31

3,817,046 Views

05:21

Health

How do cigarettes affect the body?

Lesson duration 05:21

18,027,933 Views

05:43

Social Studies

Is there any truth to the King Arthur legends?

Lesson duration 05:43

3,022,751 Views

05:18

Mathematics

Can you solve the rebel supplies riddle?

Lesson duration 05:18

2,854,503 Views

06:07

Science & Technology

What is the universe expanding into?

Lesson duration 06:07

1,795,239 Views

02:54

Health

Is sitting too close to the TV really bad for you?

Lesson duration 02:54

255,553 Views

12:00

Social Studies

What I learned as a prisoner in North Korea - Euna Lee

Lesson duration 12:00

2,977,039 Views

04:44

Psychology

The surprising link between stress and memory

Lesson duration 04:44

972,184 Views

05:31

Literature & Language

Why should you read "One Hundred Years of Solitude"?

Lesson duration 05:31

3,766,589 Views

04:19

Psychology

What is imposter syndrome and how can you combat it?

Lesson duration 04:19

4,493,846 Views

05:08

Mathematics

Can you solve the Leonardo da Vinci riddle?

Lesson duration 05:08

4,166,799 Views

05:12

Social Studies

Why is Aristophanes called "The Father of Comedy"?

Lesson duration 05:12

828,977 Views

18:32

Psychology

Why I'm done trying to be "man enough" - Justin Baldoni

Lesson duration 18:32

3,515,280 Views

04:58

Literature & Language

Zen kōans: unsolvable enigmas designed to break your brain

Lesson duration 04:58

3,021,922 Views

17:25

Teaching & Education

How teachers can help kids find their political voices - Sydney Chaffee

Lesson duration 17:25

95,681 Views

04:53

History

What really happened to the Library of Alexandria?

Lesson duration 04:53

2,751,405 Views