Intermediate Lessons

What are those floaty things in your eye? - Michael Mauser

How do lungs work? - Emma Bryce

How does cancer spread through the body? - Ivan Seah Yu Jun

How do scars form? - Sarthak Sinha

How a wound heals itself - Sarthak Sinha

How to understand power - Eric Liu

The language of lying — Noah Zandan

The unexpected math behind Van Gogh's "Starry Night" - Natalya St. Clair

Could comets be the source of life on Earth? - Justin Dowd

Is our climate headed for a mathematical tipping point? - Victor J. Donnay

How do germs spread (and why do they make us sick)? - Yannay Khaikin and Nicole Mideo

A different way to visualize rhythm - John Varney

Schrödinger's cat: A thought experiment in quantum mechanics - Chad Orzel

History vs. Christopher Columbus - Alex Gendler

Light seconds, light years, light centuries: How to measure extreme distances - Yuan-Sen Ting

How do vitamins work? - Ginnie Trinh Nguyen

A brief history of melancholy - Courtney Stephens

If matter falls down, does antimatter fall up? - Chloé Malbrunot

Cloudy climate change: How clouds affect Earth's temperature - Jasper Kirkby

How cosmic rays help us understand the universe - Veronica Bindi

Where do genes come from? - Carl Zimmer

The history of tattoos - Addison Anderson

Particles and waves: The central mystery of quantum mechanics - Chad Orzel

The chemistry of cold packs - John Pollard

Making a TED-Ed Lesson: Bringing a pop-up book to life

Why do we pass gas? - Purna Kashyap

Corruption, wealth, and beauty: The history of the Venetian gondola - Laura Morelli

What did dogs teach humans about diabetes? - Duncan C. Ferguson

What happens when you remove the hippocampus? - Sam Kean

Feedback loops: How nature gets its rhythms - Anje-Margriet Neutel

What can Schrödinger's cat teach us about quantum mechanics? - Josh Samani

How do tornadoes form? - James Spann

The past, present, and future of the bubonic plague - Sharon N. DeWitte

How do you know you exist? - James Zucker

How optical illusions trick your brain - Nathan S. Jacobs

The secret lives of baby fish - Amy McDermott

What causes antibiotic resistance? - Kevin Wu

What's hidden among the tallest trees on Earth? - Wendell Oshiro

The nurdles' quest for ocean domination - Kim Preshoff

The coelacanth: A living fossil of a fish - Erin Eastwood

The history of the barometer (and how it works) - Asaf Bar-Yosef

Under the hood: The chemistry of cars - Cynthia Chubbuck

How playing an instrument benefits your brain - Anita Collins

How quantum mechanics explains global warming - Lieven Scheire

The many meanings of Michelangelo's Statue of David - James Earle

It's a church. It's a mosque. It's Hagia Sophia. - Kelly Wall

What makes tattoos permanent? - Claudia Aguirre

Inside the ant colony - Deborah M. Gordon