TED-Ed

James Gillies: Dark matter: The matter we can't see (2013x193)

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The Greeks had a simple and elegant formula for the universe: just earth fire wind and water. Turns out there's more to it than that -- a lot more. Visible matter (and that goes beyond the four Greek elements) comprises only 4% of the universe. CERN scientist James Gillies tells us what accounts for the remaining 96% (dark matter and dark energy) and how we might go about detecting it. [Directed by Jeremiah Dickey, narrated by James Gillies].