Why is the US Constitution so hard to amend?
Lesson duration 04:18
When it was ratified in 1789, the US Constitution didn’t just institute a government by the...
Lesson duration 04:18
When it was ratified in 1789, the US Constitution didn’t just institute a government by the...
Lesson duration 07:21
In the Maasai community where Richard Turere lives with his family, cattle are all-important. But...
Lesson duration 04:39
Often people make decisions that are not “rational” from a purely economical point of view —...
Lesson duration 03:05
How are spacetime, dark matter and gravity related? In celebration of the centennial of...
Lesson duration 05:05
In many ways, our memories make us who we are, helping us remember our past, learn and retain...
Lesson duration 04:24
Your cell phone is mainly made of plastics and metals. It’s easy to appreciate the process by...
Lesson duration 07:20
Sigmund Freud appreciated the many ways in which our minds are troubled and anxious. He invented...
Lesson duration 04:54
More than a century after first emerging into the fogbound, gaslit streets of Victorian London,...
Lesson duration 03:03
Ever heard the phrase "Those who can't do, teach"? At the Bowery Poetry Club, slam poet Taylor...
Lesson duration 04:46
Massive vines that blanket the southern United States, climbing high as they uproot trees and...
Lesson duration 04:39
Can plants talk to each other? It certainly doesn’t seem that way: They don’t have complex...
Lesson duration 05:08
Is creativity elusive? Is it exclusive? What factors may affect how imaginative you are? We...
Lesson duration 04:49
If you visit a museum with a collection of modern and contemporary art, you’re likely to see...
Lesson duration 11:44
The world's roundest object helps solve the longest running problem in measurement -- how to...
Lesson duration 04:58
They’re cute, they’re lovable, and judging by the 26 billion views on over 2 million YouTube...
Lesson duration 04:43
What is consciousness? Can an artificial machine really think? For many, these have been vital...
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At this very moment, people are lining up somewhere to scare themselves, be it with a...
Lesson duration 07:58
How long did it take you to learn how to ride a bicycle? How long do you think it would take you...
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It starts with a tickle in your throat that becomes a cough. Your muscles begin to ache, you...
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Imagine a police lineup where ten witnesses are asked to identify a bank robber they glimpsed...
Lesson duration 04:04
¿Cómo funciona una computadora u ordenador? Sus componentes críticos son los periféricos, el...
Lesson duration 04:23
The human brain is one of the most sophisticated organs in the world, a supercomputer made of...
Lesson duration 04:37
You've probably seen a few cubes sitting in an art gallery and questioned why they were there....
Lesson duration 04:39
It can be hard sometimes, when speaking, to remember all of the grammatical rules that guide us...