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Albert Einstein

General relativity, 100 years on...

... force of gravity.  Naturally he started work on his own theory and sure enough, he cracked it. Mass causes space ... hugely popular, hugely influential.  Whereas Einstein's own work marketing the theory didn't actually appear in ...

universe

Getting to grips with relativity: Why Luke and Leia are different ages

... because the ball has the trolley’s motion and its own motion relative to the trolley. David - When the trolley ...