I just came across an interesting
video clip from one of the Apollo moon missions. We are taught that without air
resistance, a feather and a heavy, dense object will fall at the same speed. On
earth, this is hard to visualize and leaves some skeptical. This video is a
simple experiment that the Apollo 15 astronauts performed on the moon 37 years
ago. (Don't know how this would have pulled off on a sound stage in Area 51
unless the feather was made of lead...)
http://www.aerospaceweb.org/question/dynamics/gravity/apollo15.avi