Feather and ball dropped in vacuum

Here is that classic experiment of dropping a ball and a feather in a vacuum. But the twist here is that it is done in world’s largest vacuum chamber. Narrated enthusiastically by Brian Cox, even the experts are excited by this classic experiment and it’s well known outcome. 

Cox concludes with the intellectual link from Galileo, Newton to Einstein’s principle of equivalence

via Science Alert and iO9

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