Social Studies
Democracy is being tested. Citizen assemblies can help - Ketakandriana Rafitoson
Lesson duration 14:24
How can everyday people help foster and protect democracy? Detailing her work fighting for people...
Health
How does kidney transplant surgery work?
Lesson duration 05:18
In 1954, Joseph Murray attempted a type of kidney swap that no doctor had tried before. The...
Health
The real reason polio is so dangerous
Lesson duration 06:35
In 1952, polio was everywhere: killing or paralyzing roughly half a million people annually. Yet...
Social Studies
How to be fearless in the face of authoritarianism - Sviatlana Tsikhanouskaya
Lesson duration 05:45
How do you stand up to authoritarianism? In this powerful talk, housewife-turned-politician...
Literature & Language
The curse of the monkey's paw
Lesson duration 06:35
Sergeant-Major Morris regaled his friends with epic tales from faraway lands— until one asked...
Science & Technology
How do heat waves affect your body?
Lesson duration 06:06
In many parts of the world heat waves are happening more often with greater intensity and for...
Health
3 reasons why medications are so expensive in the US
Lesson duration 05:20
A century after its discovery, insulin remain essential in treating diabetes, and has a...
Thinking & Learning
The dungeon master's riddle
Lesson duration 05:18
Yet another party of adventurers has broken into your lair to slay your minions and steal your...
Health
What are those colors you see when you rub your eyes?
Lesson duration 05:22
In the 1600s, Isaac Newton conducted a series of experiments to better understand the lights and...
Social Studies
The real tale of the Monkey King in Heaven
Lesson duration 05:25
While his disciples loved their roguish leader, Sun Wukong’s misadventures had spread chaos...
Science & Technology
This mushroom will kill you before you know what’s happening
Lesson duration 05:37
Humans have known about the toxicity of death cap mushrooms for millennia. Yet they continue to...
Social Studies
Greek mythology’s greatest warrior
Lesson duration 05:41
Born to a sea nymph and a king, and trained by the legendary centaur Chiron, Achilles was a...
Science & Technology
Are there any places on Earth with no bugs?
Lesson duration 05:01
Insects are the world’s most numerous and diverse animals. Even where you’d least expect...
Science & Technology
You'll travel 1 trillion kilometers through space
Lesson duration 05:39
Your granddaughter created a surprise for your birthday: a holographic map displaying everywhere...
Science & Technology
Why did it take so long to find giant squids?
Lesson duration 05:35
In 1873, fishermen glimpsed what they thought was a shipwreck. But when they probed the mass, it...
Social Studies
What is hysteria, and why were so many women diagnosed with it?
Lesson duration 05:49
Do you ever feel tired? Overwhelmed? Depressed? Do you have headaches, dizziness, cramps,...
Psychology
Why your phone is making you sad
Lesson duration 09:45
Phone addiction is real, and researchers are becoming more concerned with what it is doing to our...
Science & Technology
The birth of the galaxy in 60 seconds
Lesson duration 05:27
Thirteen billion years ago, the gas and dust particles that eventually became our Milky Way were...
Health
What’s the best way to treat the common cold?
Lesson duration 05:33
From incantations in ancient Egypt, bloodletting in 18th century Europe, to President Coolidge...
Health
11 things that can change your eye color
Lesson duration 12:24
You can dye your hair, you can get a tan, but the color of your eyes is pretty much set in stone...
Design, Engineering & Technology
The thing in your kitchen most likely to kill you
Lesson duration 04:48
Between 2011 and 2022, the deadliest kitchen appliances in the US were ovens and ranges; taking...
Science & Technology
How do animals regrow their limbs? And why can't humans do it?
Lesson duration 05:28
For some animals, losing a limb is a decidedly permanent affair. But for salamanders,...
Health
What does appendix pain feel like?
Lesson duration 05:38
In 1961, an Antarctic expedition took a harrowing turn: Dr. Leonid Rogozov began feeling...
Science & Technology
The surprising reason zebras have stripes
Lesson duration 05:55
Zebras belong to the same equine family as horses and donkeys. After their lineage entered...