0:44
This video proves that gravity doesn't care about the weight of an object. It compares to objects of completely different weights and shows how they will hit the ground at the same time regardless.
  • 13 Mar 2008
  • 2 917
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3:06
In this video we create a simple version of Thomas Edison's early light bulb experiment.
  • 30 Aug 2007
  • 46 255
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