Browse Lessons

Why do we feel nostalgia? - Clay Routledge

How do US Supreme Court justices get appointed? - Peter Paccone

How to recognize a dystopia - Alex Gendler

Do we really need pesticides? - Fernan Pérez-Gálvez

Why do whales sing? - Stephanie Sardelis

Are food preservatives bad for you? - Eleanor Nelsen

Why are sharks so awesome? - Tierney Thys

How the sandwich was invented | Moments of Vision 5 - Jessica Oreck

Can you solve the river crossing riddle? - Lisa Winer

The Egyptian Book of the Dead: A guidebook for the underworld - Tejal Gala

What caused the French Revolution? - Tom Mullaney

Plato’s best (and worst) ideas - Wisecrack

Why should you listen to Vivaldi's "Four Seasons"? - Betsy Schwarm

How much of human history is on the bottom of the ocean? - Peter Campbell

Why is Vermeer's "Girl with the Pearl Earring" considered a masterpiece? - James Earle

What causes cavities? - Mel Rosenberg

What happens to our bodies after we die? - Farnaz Khatibi Jafari

How the rubber glove was invented | Moments of Vision 4 - Jessica Oreck

Is it bad to hold your pee? - Heba Shaheed

How does the Nobel Peace Prize work? - Adeline Cuvelier and Toril Rokseth

Could we survive prolonged space travel? - Lisa Nip

Can you solve the prisoner boxes riddle? - Yossi Elran

Could human civilization spread across the whole galaxy? - Roey Tzezana

The history of African-American social dance - Camille A. Brown

The history of the Cuban Missile Crisis - Matthew A. Jordan

Why are there so many types of apples? - Theresa Doud

How to use rhetoric to get what you want - Camille A. Langston

How do contraceptives work? - NWHunter

Aphasia: The disorder that makes you lose your words - Susan Wortman-Jutt

What is a vector? - David Huynh

How the Band-Aid was invented | Moments of Vision 3 - Jessica Oreck

Is graffiti art? Or vandalism? - Kelly Wall

One of the most difficult words to translate... - Krystian Aparta

How the Königsberg bridge problem changed mathematics - Dan Van der Vieren

How smart are orangutans? - Lu Gao

The paradox of value - Akshita Agarwal

How do animals see in the dark? - Anna Stöckl

Are spotty fruits and vegetables safe to eat? - Elizabeth Brauer

What is the biggest single-celled organism? - Murry Gans

How to visualize one part per million - Kim Preshoff + The TED-Ed Community

How a single-celled organism almost wiped out life on Earth - Anusuya Willis

How coffee got quicker | Moments of Vision 2 - Jessica Oreck

Real life sunken cities - Peter Campbell

Which sunscreen should you choose? - Mary Poffenroth

Why do we hiccup? - John Cameron

Should we be looking for life elsewhere in the universe? - Aomawa Shields

Why the metric system matters - Matt Anticole

How did Hitler rise to power? - Alex Gendler and Anthony Hazard