Michael Turner is director and Rauner Distinguished Service Professor at the Kavli Institute for Cosmological Physics at The University of Chicago in Chicago, Illinois.
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22:06
One Hundred Years of General Relativity
Albert Einstein published his theory of general relativity on December 2, 1915.
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More to the Universe Than Meets the Eye
The universe is full of invisible stuff. Take dark matter–you can’t spot it with your eyes, but it outnumbers visible matter five to one!