Browse Lessons

How one person saved over 2,000 children from the Nazis - Iseult Gillespie

A brief history of toilets - Francis de los Reyes

The sharks that hunt in forests - Luka Seamus Wright

Ugly History: The U.S. Syphilis Experiment - Susan M. Reverby

The woman who stared at the Sun - Alex Gendler

Run, sail, or hide? How to survive the destruction of Pompeii - Gary Devore

What happens to your brain during a migraine - Marianne Schwarz

Should you donate your DNA to help cure diseases? - Greg Foot

How one design flaw almost toppled a skyscraper - Alex Gendler

How long should your naps be? - Sara C. Mednick

Can you solve Dongle's Difficult Dilemma? - Dennis E. Shasha

How the world’s tallest skyscraper was built - Alex Gendler

Why are airplanes slower than they used to be? - Alex Gendler

This tool will help improve your critical thinking - Erick Wilberding

Why good ideas get trapped in the valley of death— and how to rescue them

How to see with sound - Jacques S. Abramowicz

Ugly History: The Spanish Inquisition - Kayla Wolf

4 different ways you can power a car

How much land does it take to power the world?

The best nose in the animal kingdom - Chase LaDue & Bruce A. Schulte

How does artificial intelligence learn? - Briana Brownell

How much electricity does it take to power the world?

Can loud music damage your hearing? - Heather Malyuk

The material that could change the world... for a third time

How scientists turn lakes into giant batteries

The “myth” of the boiling frog

The satisfying math of folding origami - Evan Zodl

What causes dandruff, and how do you get rid of it? - Thomas L. Dawson

Uncovering the brain's biggest secret - Melanie E. Peffer

Why didn’t this 2,000 year old body decompose? - Carolyn Marshall

What if every satellite suddenly disappeared? - Moriba Jah

The Japanese myth of the trickster raccoon - Iseult Gillespie

The rise of the Ottoman Empire - Mostafa Minawi

Who decides how long a second is? - John Kitching

We can help you master public speaking - Chris Anderson

Why should you read Toni Morrison’s “Beloved”? - Yen Pham

The life cycle of a cup of coffee - A.J. Jacobs

Do personality tests work? - Merve Emre

The strange history of the world's most stolen painting - Noah Charney

This thought experiment will help you understand quantum mechanics - Matteo Fadel

The most colorful gemstones on Earth - Jeff Dekofsky

Which bag should you use? - Luka Seamus Wright and Imogen Ellen Napper

How do investors choose stocks? - Richard Coffin

How do steroids affect your muscles— and the rest of your body? - Anees Bahji

The dark history of bananas - John Soluri

Can you outsmart a troll (by thinking like one)? - Claire Wardle

The rise and fall of history’s first empire - Soraya Field Fiorio

The myth of the stolen eyeballs - Nathan D. Horowitz