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4:30

TED-Ed

Why do women have periods?

Posted Oct 2015
4:16

TED-Ed

The Maya myth of the morning star

Posted Oct 2019
5:22

Alex Gendler

Why elephants never forget

Posted Nov 2014
5:13

Krishna Sudhir

How do cigarettes affect the body?

Posted Sep 2018
4:41

Hugo Mercier

How can you change someone's mind?

Posted Jul 2018
6:15

Greg Gage

The cockroach beatbox

Posted Mar 2012
4:37

Gordon Hamilton

Can you solve the Mondrian squares riddle?

Posted Jun 2018
3:00

Christopher Warner

Situational irony: The opposite of what you think

Posted Dec 2012
3:33

Dan Finkel

Can you solve the secret werewolf riddle?

Posted Nov 2018
5:31

Noah Tavlin

What "Orwellian" really means

Posted Oct 2015
3:48

Ganesh Pai

Can you solve the passcode riddle?

Posted Jul 2016
3:43

Iseult Gillespie

The Irish myth of the Giant's Causeway

Posted Jun 2018
3:00

Daniel Finkel

Can you solve the troll's paradox riddle?

Posted Dec 2018
4:19

Dennis Shasha

Can you solve the stolen rubies riddle?

Posted Oct 2018
4:27

Lina Marieth Hoyos

What is the coldest thing in the world?

Posted Jul 2018
3:49

Daniel Finkel

Can you solve the time travel riddle?

Posted Dec 2018
4:38

Janell Hobson

The breathtaking courage of Harriet Tubman

Posted Jul 2018
4:38

Alex Gendler

The myth of Sisyphus

Posted Nov 2018
4:46

Elizabeth Cox

The surprising link between stress and memory

Posted Sep 2018
3:24

Daniel Finkel

Can you solve the unstoppable blob riddle?

Posted Mar 2019
4:10

Daniel Finkel

Can you solve the killer robo-ants riddle?

Posted Oct 2018
4:59

Mark Robinson

Why is Aristophanes called "The Father of Comedy"?

Posted Aug 2018
3:21

Jeff Dekofsky

Euclid's puzzling parallel postulate

Posted Mar 2013
4:22

Dan Finkel

Can you solve the rogue AI riddle?

Posted Aug 2018
4:32

Daniel Finkel

Can you solve the alien probe riddle?

Posted Sep 2018
2:55

Alex Gendler

Can you solve the giant iron riddle?

Posted Nov 2018
3:40

Dennis Shasha

Can you solve the control room riddle?

Posted Jun 2016
4:39

Scott A. Mellor

How Thor got his hammer

Posted Jan 2019
3:27

Yannay Khaikin

How many ways can you arrange a deck of cards?

Posted Mar 2014
3:32

Daniel Finkel

Can you solve the vampire hunter riddle?

Posted Jan 2019
4:03

Dennis Shasha

Can you solve the temple riddle?

Posted Feb 2016
3:30

Reynaldo Lopes

The infinite life of pi

Posted Jul 2013
4:10

Elizabeth Cox

Is fire a solid, a liquid, or a gas?

Posted Nov 2018
4:44

Sophie Zadeh

Are there universal expressions of emotion?

Posted Jul 2018
4:37

Alex Gendler

Can you solve the rebel supplies riddle?

Posted Sep 2018
3:56

Colm Kelleher

What is Zeno's Dichotomy Paradox?

Posted Apr 2013