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For half a minute, guys, what is gravity? Is it a force as defined by Isaac Newton or is it something related to the curvature of space-time as Einstein told us? Who was right? Let's see! 00:00 Gravity according to Newton 02:58 Einstein and Relativity 03:40 Einstein's thought experiment 10:30 Geodesic orbit-Example 13:20 Space-time curvature-Example 18:16 Time and Relativity 21:37 Verification of the General Theory of Gravity 27:02 Final Thought