TweenTribune: Why Are Planets Round?

The answer has everything to do with falling flat on your face. (0:54)


Latest Videos

Preview thumbnail for video'Killers Don't Always Look the Part
Killers Don't Always Look the Part (2:50)
Preview thumbnail for video'Anthology of Hip-Hop and Rap
Anthology of Hip-Hop and Rap (2:28)
Preview thumbnail for video'Smithsonian Ingenuity Awards 2013: Caroline Winterer
Smithsonian Ingenuity Awards 2013: Caroline Winterer (1:50)
Preview thumbnail for video'Smithsonian Ingenuity Awards 2013: Dave Eggers and Mimi Lok
Smithsonian Ingenuity Awards 2013: Dave Eggers and Mimi Lok (1:56)
Preview thumbnail for video'Smithsonian Ingenuity Awards 2013: Caroline Hoxby
Smithsonian Ingenuity Awards 2013: Caroline Hoxby (2:02)
Preview thumbnail for video'March on Washington - Eleanor Holmes Norton
March on Washington - Eleanor Holmes Norton (1:16)
Preview thumbnail for video'March on Washington - Julian Bond
March on Washington - Julian Bond (1:03)
Preview thumbnail for video'Weird Science: It Snows What on Venus?
Weird Science: It Snows What on Venus? (0:15)
Preview thumbnail for video'Seismic Waves Generated by Hurricane Sandy
Seismic Waves Generated by Hurricane Sandy (1:00)