Browse Lessons

Has there ever been a good dictator? - Stephanie Honchell Smith

Scientists are obsessed with this lake - Nicola Storelli and Daniele Zanzi

How could so many people support Hitler? - Joseph Lacey

Why do bugs swarm over water? - Luke M. Jacobus

How to increase your happiness

How do gas masks actually work? - George Zaidan

The rise and fall of the Maya Empire’s most powerful city - Geoffrey E. Braswell

Does math have a major flaw? - Jacqueline Doan and Alex Kazachek

Picture a perfect society. What does it look like? - Joseph Lacey

The Nazis recruited to win the Cold War - Brian Crim

How to prevent political corruption - Stephanie Honchell Smith

The true story behind the legend of the 47 Rōnin - Adam Clulow

Why is "The Scream" screaming? - Noah Charney

What is earwax — and should you get rid of it? - Henry C. Ou

What Earth in 2050 could look like - Shannon Odell

The Greek myth of Demeter's revenge - Iseult Gillespie

The underground cities of the Byzantine Empire - Veronica Kalas

What causes addiction, and why is it so hard to treat? - Judy Grisel

Why was the Rosetta Stone so important? - Franziska Naether

One of the world’s oldest condiments - Dan Kwartler

5 philosophers on anger - Delaney Thull

How humanity got hooked on coffee - Jonathan Morris

Will the real Fernando please stand up? - Ilan Stavans

Can you solve the magical maze riddle? - Alex Rosenthal

The warrior who defeated the mighty Mughals - Stephanie Honchell Smith

When ancient wisdom beats modern industry - Rebecca Webster

Why can't you put metal in a microwave? - Aaron Slepkov

The Fijian myth of the greedy god - Raiana McKinney and Esther Wozniak

Is Chandigarh a perfectly planned city? - Vikramāditya Prakāsh

The corpse flower may keep you up at night - Daniel Nickrent

How does alcohol cause blackouts? - Shannon Odell

The real reason dodo birds went extinct - Leon Claessens

Would you raise the baby that ate your siblings? - Francesca Barbero

How to know if you're selfish (and whether or not that's bad) - Mark Hopwood

History vs. Egypt’s "most powerful" pharaoh - Jessica Tomkins

How much would it cost to buy the ocean? - Astrid J. Hsu

Why is rice so popular? - Carolyn Beans

Are pandas the most misunderstood animal? - Lucy Cooke

Why is Texas hold 'em so popular? - James McManus

How to get motivated even when you don’t feel like it

The science of laughter - Sasha Winkler

Does planting trees actually cool the planet? - Carolyn Beans

How does whale communication work? - David Gruber and Shane Gero

The largest river on Earth is actually in the sky - Iseult Gillespie

The rights you might not realize you have - Shannon Odell

How did South African Apartheid happen, and how did it finally end? - Thula Simpson

How to make smart decisions more easily

The diseases that changed humanity forever - Dan Kwartler