Browse Lessons

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

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

Earworms: Those songs that get stuck in your head - Elizabeth Hellmuth Margulis

What did democracy really mean in Athens? - Melissa Schwartzberg

Where did Earth’s water come from? - Zachary Metz

Can robots be creative? - Gil Weinberg

Plato’s Allegory of the Cave - Alex Gendler

Why it’s so hard to cure HIV/AIDS - Janet Iwasa

The real story behind Archimedes’ Eureka! - Armand D'Angour

Learning from smallpox: How to eradicate a disease - Julie Garon and Walter A. Orenstein

How brain parasites change their host's behavior - Jaap de Roode

Why sitting is bad for you - Murat Dalkilinç

Rhythm in a box: The story of the cajon drum - Paul Jennings

How does the thyroid manage your metabolism? - Emma Bryce

The law of conservation of mass - Todd Ramsey

Did Shakespeare write his plays? - Natalya St. Clair and Aaron Williams

The last banana: A thought experiment in probability - Leonardo Barichello

What does the pancreas do? - Emma Bryce

How we think complex cells evolved - Adam Jacobson

History vs. Richard Nixon - Alex Gendler

The sonic boom problem - Katerina Kaouri

How do your kidneys work? - Emma Bryce

Why do we have museums? - J. V. Maranto

Why are some people left-handed? - Daniel M. Abrams

How do dogs "see" with their noses? - Alexandra Horowitz

How does your smartphone know your location? - Wilton L. Virgo

Why Shakespeare loved iambic pentameter - David T. Freeman and Gregory Taylor

Why do buildings fall in earthquakes? - Vicki V. May

Why the Arctic is climate change's canary in the coal mine - William Chapman

What triggers a chemical reaction? - Kareem Jarrah

Could a blind eye regenerate? - David Davila

How will TED-Ed celebrate its 1,000,000th subscriber?

How spontaneous brain activity keeps you alive - Nathan S. Jacobs

How do vaccines work? - Kelwalin Dhanasarnsombut

The evolution of the human eye - Joshua Harvey

Einstein's miracle year - Larry Lagerstrom

The benefits of a good night's sleep - Shai Marcu

What is a gift economy? - Alex Gendler

The Atlantic slave trade: What too few textbooks told you - Anthony Hazard