What Is Gravity? Veritasium : Season 2 Episode 14
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Aired: February 21st, 2011 @ 12:00 AM EST on YouTube
People have a lot of different ideas about what gravity is: a downward force that stops you from flying off into space, an attraction smaller objects experience towards larger objects or a mutual attraction between all masses. It is the last of these ideas that best reflect a scientific conception of gravity.