TED-Ed

When will the next mass extinction occur? – Borths, D’Emic, and Pritchard

How do wind turbines work? – Rebecca J. Barthelmie and Sara C. Pryor

Does “The Wonderful Wizard of Oz” have a hidden message? – David B. Parker

Why elephants never forget – Alex Gendler

Can you solve the sea monster riddle? – Dan Finkel

Why is meningitis so dangerous? – Melvin Sanicas

Can you spot the problem with these headlines? (Level 1) – Jeff Leek & Lucy McGowan

What happens if you don’t put your phone in airplane mode? – Lindsay DeMarchi

How do schools of fish swim in harmony? – Nathan S. Jacobs

Can you solve the wizard standoff riddle? – Dan Finkel

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

Can you solve the penniless pilgrim riddle? – Daniel Finkel

“Three Months After” by Cristin O’Keefe Aptowicz

A day in the life of a teenage samurai – Constantine N. Vaporis

String theory – Brian Greene

The Maya myth of the morning star

How does your body know you’re full? – Hilary Coller

What did people do before anesthesia? – Sally Frampton

Why is it so hard to cure ALS? – Fernando G. Vieira

The smallest solution to one of our biggest problems – Tierney Thys & Christian Sardet

The gory history of barber surgeons – Stephanie Honchell Smith

Why do we have to wear sunscreen? – Kevin P. Boyd

How long should your naps be? – Sara C. Mednick

The historic women’s suffrage march on Washington – Michelle Mehrtens

Nature’s smallest factory: The Calvin cycle – Cathy Symington

Why you procrastinate even when it feels bad

How do blood transfusions work? – Bill Schutt

Food expiration dates don’t mean what you think – Carolyn Beans

Epic battles, burials, and races: How horses changed everything – William T. Taylor

Does grammar matter? – Andreea S. Calude

Why is cotton in everything? – Michael R. Stiff

Why people fall for misinformation – Joseph Isaac

The continents are moving. When will they collide? – Jean-Baptiste P. Koehl

Making sense of a visible quantum object – Aaron O’Connell

Pavlovian reactions aren’t just for dogs – Benjamin N. Witts

A guide to the energy of the Earth – Joshua M. Sneideman

What is chemical equilibrium? – George Zaidan and Charles Morton

Why do we feel nostalgia? – Clay Routledge

The epic of Gilgamesh, the king who tried to conquer death – Soraya Field Fiorio

Gravity and the human body – Jay Buckey