How We're Redefining the kg
9:58
O kg está morto, vida longa ao kg
15:34
How To Measure The Tiniest Forces In The Universe
11:34
Planck Time - The shortest measure of time
14:49
The Bizarre Behavior of Rotating Bodies
13:13
How Was Video Invented?
16:18
Not Knot
11:44
World's Roundest Object!
15:38