Why do we, like, hesitate when we, um, speak?
Lesson duration 05:34
For as long as we’ve had language, some people have tried to control it. And some of the most...
Lesson duration 05:34
For as long as we’ve had language, some people have tried to control it. And some of the most...
Lesson duration 04:41
Since 1850, global average temperatures have risen by 1 degree Celsius. That may not sound like a...
Lesson duration 05:23
Origami, which literally translates to “folding paper,” is a Japanese practice dating back to at...
Lesson duration 04:23
"We spend so much time listening to the things people are saying that we rarely pay attention to...
Lesson duration 05:05
On top of our heads, there is a type of yeast that lives and dines on all of our scalps. Feasting...
Lesson duration 06:26
Basic math tells us that all humans share ancestors, but it’s amazing how recently those shared...
Lesson duration 05:09
In the 1860s, scientists believed they were on the verge of uncovering the brain’s biggest...
Lesson duration 05:00
It may not appear very lively six feet underground, but a single teaspoon of soil contains more...
Lesson duration 05:17
What would happen if one day all of humanity’s artificial satellites suddenly disappeared? Within...
Lesson duration 03:12
As of 2016, of the 7 billion people on Earth, roughly 6 billion own a cellphone. So what are...
Lesson duration 04:43
For most humans, farts are a welcome relief, an embarrassing incident, or an opportunity for a...
Lesson duration 15:06
Trust is the foundation for everything we do. But what do we do when it's broken? In an...
Lesson duration 05:39
Formally or informally, human societies across place and time have made rules to bind and...
Lesson duration 09:41
Short selling lets investors bet against a stock, profiting when it falls in price. But how...
Lesson duration 05:50
Consider a bat that is infected with several deadly viruses, including ones that cause rabies,...
Lesson duration 03:37
On the dusty roads of a small village, a traveling salesman was having difficulty selling his...
Lesson duration 07:20
For anyone who believes poetry is stuffy or elitist, National Youth Poet Laureate Amanda Gorman...
Lesson duration 05:15
In the late 13th century, Osman I established a small principality sandwiched between a crumbling...
Lesson duration 05:47
In 1967, researchers gathered to answer a long-running scientific question: just how long is a...
Lesson duration 48:39
Written April 16th, 1963 by Martin Luther King Jr, the Letter from Birmingham Jail was a response...
Lesson duration 13:41
Can technology make people safer from threats like violent extremism, censorship and persecution?...
Lesson duration 04:30
Storytelling is an ancient art; as humans developed language and culture, we learned to share our...
Lesson duration 05:41
Princess Savitri was benevolent, brilliant, and bright. Her grace was known throughout the land,...
Lesson duration 04:57
In 1947, explorers noticed a strange phenomenon while crossing the Pacific Ocean. Somehow, small...