05:34

Mathematics

A riddle of ice and fire dragons

Lesson duration 05:34

1,355,971 Views

06:24

Thinking & Learning

Can you solve the Big Bang riddle?

Lesson duration 06:24

1,313,379 Views

04:42

Thinking & Learning

Can you outsmart the fallacy that divided a nation?

Lesson duration 04:42

935,187 Views

04:48

Mathematics

Can you solve the birthday cake riddle?

Lesson duration 04:48

1,912,805 Views

04:46

Business & Economics

Why is it so hard to escape poverty?

Lesson duration 04:46

5,666,114 Views

04:26

Philosophy & Religion

You can only save one— who do you choose?

Lesson duration 04:26

2,342,078 Views

05:14

Science & Technology

How to get better at video games, according to babies

Lesson duration 05:14

557,837 Views

05:54

Thinking & Learning

Can you solve the computer virus riddle?

Lesson duration 05:54

1,312,991 Views

05:06

Science & Technology

Where will you be able to live in 20 years?

Lesson duration 05:06

551,590 Views

05:55

Science & Technology

How we can detect pretty much anything

Lesson duration 05:55

327,512 Views

05:07

Thinking & Learning

Can you solve the giant spider riddle?

Lesson duration 05:07

3,162,264 Views

05:06

Science & Technology

The method that can "prove" almost anything

Lesson duration 05:06

844,162 Views

05:20

Mathematics

The paradox at the heart of mathematics: Gödel's Incompleteness Theorem

Lesson duration 05:20

3,893,295 Views

04:53

Thinking & Learning

Can you cheat death by solving this riddle?

Lesson duration 04:53

5,730,085 Views

05:38

Thinking & Learning

Can you solve the Trojan War riddle?

Lesson duration 05:38

2,751,316 Views

05:16

Design, Engineering & Technology

How one design flaw almost toppled a skyscraper

Lesson duration 05:16

885,921 Views

04:58

Health

How long should your naps be?

Lesson duration 04:58

5,541,921 Views

05:36

Design, Engineering & Technology

Demolition, disease, and death: Building the Panama Canal

Lesson duration 05:36

1,393,669 Views

05:42

Thinking & Learning

Can you solve Dongle's Difficult Dilemma?

Lesson duration 05:42

2,230,270 Views

05:03

Design, Engineering & Technology

How do wind turbines work?

Lesson duration 05:03

1,273,689 Views

04:59

Design, Engineering & Technology

Why are airplanes slower than they used to be?

Lesson duration 04:59

2,481,899 Views

05:40

Environmental Science

Whatever happened to acid rain?

Lesson duration 05:40

2,656,480 Views

05:20

Thinking & Learning

This tool will help improve your critical thinking

Lesson duration 05:20

6,867,104 Views

05:48

Thinking & Learning

Can you outsmart the apples and oranges fallacy?

Lesson duration 05:48

1,172,766 Views