19:17
The Skill of Humor | Andrew Tarvin | TEDxTAMU
15:04
Why people believe they can’t draw - and how to prove they can | Graham Shaw | TEDxHull
13:22
What if you could trade a paperclip for a house? | Kyle MacDonald | TEDxVienna
19:02
What Makes People Engage With Math | Grant Sanderson | TEDxBerkeley
14:11