ted-ed

In on a secret? That's dramatic irony

Is light a particle or a wave?

How to defeat a dragon with math

How we see color

You are your microbes

What is color?

Why is there a "b" in doubt?

Situational irony: The opposite of what you think

How do cancer cells behave differently from healthy ones?

What makes a hero?

How does work... work?

How did English evolve?

The genius of Mendeleev's periodic table

Three anti-social skills to improve your writing

Does stress cause pimples?

An antihero of one's own

A needle in countless haystacks: Finding habitable worlds

Does your vote count? The Electoral College explained

A glimpse of teenage life in ancient Rome

Gerrymandering: How drawing jagged lines can impact an election

Diagnosing a zombie: Brain and body (Part one)

The city of walls: Constantinople

Rethinking thinking

Why do competitors open their stores next to one another?

The art of the metaphor

How big is a mole? (Not the animal, the other one.)

How big is infinity?

The survival of the sea turtle

Calculating the odds of intelligent alien life

How do pain relievers work?

How to speed up chemical reactions (and get a date)

One is one... or is it?

Insults by Shakespeare

Just how small is an atom?

How folding paper can get you to the moon

Sex determination: More complicated than you thought