The past, present and future is no where near straight forward as you might think. BBC Horizon and Professor Brian Cox is going to find out what makes time tick. Did Time have a beginning? Does our future already exist?… (44 min, 5 segments)
spacetime
31 May 08
The Elegant Universe: Gravity - From Newton to Einstein
A short video (9:31 min) explaining Einstein’s General Theory of Relativity.
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