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Watch A Brain Parasite Played By Alan Tudyk Explain Gravity

By Mark Strauss Published June 16, 2014, 7:40 pm ET

Reading time 1 minute

The folks who run the Spitzer Space Telescope never cease to amuse with their ongoing series of educational videos, IRrelevant Astronomy. In this episode, a parasite (Alan Tudyk) dwelling in the brain of an astronomer (Wil Wheaton) answers the question, “Why do astronauts appear weightless in space?”

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