19:17
The Skill of Humor | Andrew Tarvin | TEDxTAMU
19:02
What Makes People Engage With Math | Grant Sanderson | TEDxBerkeley
13:22
What if you could trade a paperclip for a house? | Kyle MacDonald | TEDxVienna
14:11
How social media is changing how you talk | Adam Aleksic | TEDxPenn
15:04