¿Por qué algunas personas son zurdas? - Daniel M. Abrams
5:31
Why Are Some People Left-Handed?
5:26
Do you really need to take 10,000 steps a day? - Shannon Odell
4:36
Harvard negotiator explains how to argue | Dan Shapiro
5:17
Why do we have crooked teeth when our ancestors didn’t? - G. Richard Scott
14:15
The Sad Story of the Smartest Man Who Ever Lived
11:31
Etiquette Expert Answers Etiquette Questions From Twitter | Tech Support | WIRED
4:51
Debunking the myths of OCD - Natascha M. Santos
7:33