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GENIUS BY STEPHEN HAWKING | The Movement of Galaxies in Space | PBS

http://to.pbs.org/1UtjdaP
GENIUS BY STEPHEN HAWKING premieres Wednesdays, May 18-June 1, 2016, 9:00-11:00 p.m. ET on PBS.

A track race demo explains how the galaxies furthest from Earth move fastest.