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Robin Maben earned this badge 5 times |
jun 4 '12 at 23:38
Is it possible to separate the poles of a magnet?
apr 11 '12 at 11:57
Why exactly does a boomerang return back to the thrower?
feb 23 '12 at 15:53
Is pushing actually easier than pulling?
jan 21 '11 at 17:47
Great unsolved physics problems [closed]
