The Mystery of Dark Matter Video Game - Perimeter Institute for Theoretical Physics - 1 views
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valerie taylor on 18 Dec 11"The Mystery of Dark Matter Video Game - A mystery exists! Galaxies do not seem to have enough mass for stars to orbit at their observed speeds. Galaxies should be flying apart, but they don't. Why not? Explore the surreal world of dark matter - one of the universe's greatest mysteries. Click here to play the game! "