Reference:
(Apollo 15 Commander Dave Scott demonstrates that the mass of an object does not affect the time it takes to fall, using a hammer and a feather on the Moon. Taken from Spacecraftfilms.com DVD "Apollo 15: The Great Explorations Begin". {{PD-USGov-NASA}})
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http://en.wikipedia.org/wiki/File:Apollo_15_feather_and_hammer_drop.ogg