Por que o sistema métrico é importante - Matt Anticole
7:21
Who Invented the Metric System (and Why It Isn’t As Perfect as You Think)
23:29
How Imaginary Numbers Were Invented
5:22
Why we say “OK”
35:21
The Insane Math Of Knot Theory
4:51
Washington's Dream - SNL
4:49
6 myths about the Middle Ages that everyone believes - Stephanie Honchell Smith
5:47
Who decides how long a second is? - John Kitching
3:30