"Any intelligent fool can make things bigger, more complex, and more violent. It takes a touch of genius -- and a lot of courage -- to move in the opposite direction."
source: Quotes from Albert Einstein
Einstein's Special Theory of Relativity E=mc2 speed of light (07:05)
Einstein's General Theory of Relativity | Lecture 1 (1:38:28)
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Einstein's General Theory of Relativity | Lecture 2 (1:47:37)