2008 Boulder
Summer School T-shirt
Emptiness of space: a youtube video in powers of 10 (a video
from the 60's)
(http://www.youtube.com/watch?v=0fKBhvDjuy0)
A modern variant - The known universe, by the American Museum of
Natural History
(http://www.youtube.com/watch?v=17jymDn0W6U&feature)
Relativity
Stability of Bicycles (http://ruina.tam.cornell.edu/research/topics/bicycle_mechanics/stablebicycle/)