Browse Lessons

Where did English come from? - Claire Bowern

Inside the minds of animals - Bryan B Rasmussen

What is a calorie? - Emma Bryce

Why tragedies are alluring - David E. Rivas

How do pregnancy tests work? - Tien Nguyen

How to use a semicolon - Emma Bryce

History vs. Genghis Khan - Alex Gendler

The incredible history of China's terracotta warriors - Megan Campisi and Pen-Pen Chen

Why do blood types matter? - Natalie S. Hodge

How to grow a bone - Nina Tandon

The benefits of a bilingual brain - Mia Nacamulli

How X-rays see through your skin - Ge Wang

How to make a mummy - Len Bloch

Can you solve the famously difficult green-eyed logic puzzle? - Alex Gendler

Football physics: The "impossible" free kick - Erez Garty

How plants tell time - Dasha Savage

How to detect a supernova - Samantha Kuula

How people rationalize fraud - Kelly Richmond Pope

The math behind Michael Jordan’s legendary hang time - Andy Peterson and Zack Patterson

What’s the big deal with gluten? - William D. Chey

The battle of the Greek tragedies - Melanie Sirof

Will future spacecraft fit in our pockets? - Dhonam Pemba

How I responded to sexism in gaming with empathy - Lilian Chen

How batteries work - Adam Jacobson

Debunking the myths of OCD - Natascha M. Santos

Mansa Musa, one of the wealthiest people who ever lived - Jessica Smith

The complex geometry of Islamic design - Eric Broug

Sunlight is way older than you think - Sten Odenwald

The wars that inspired Game of Thrones - Alex Gendler

How in vitro fertilization (IVF) works - Nassim Assefi and Brian A. Levine

Why do your knuckles pop? - Eleanor Nelsen

What causes economic bubbles? - Prateek Singh

What is leukemia? - Danilo Allegra and Dania Puggioni

Why neutrinos matter - Sílvia Bravo Gallart

Could your brain repair itself? - Ralitsa Petrova

How to unboil an egg - Eleanor Nelsen

What really happens to the plastic you throw away - Emma Bryce

Why is biodiversity so important? - Kim Preshoff

How to spot a counterfeit bill - Tien Nguyen

Announcing TED-Ed Español

What's the difference between accuracy and precision? - Matt Anticole

Why are manhole covers round? - Marc Chamberland

The science of static electricity - Anuradha Bhagwat

How brass instruments work - Al Cannon

Camera or eye: Which sees better? - Michael Mauser

The effects of underwater pressure on the body - Neosha S Kashef

What causes bad breath? - Mel Rosenberg

How do geckos defy gravity? - Eleanor Nelsen