Is Gravity a Feature of Space Time?

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Einstein said gravity is not as easy to reconcile with special relativity as electromagnetism was. He bought into this whole space time idea that Minkowski had, right? Einstein sat down to learn non-Euclidean geometry from Marcel Grossman and worked out the most important work there.

My little pandemic-lockdown contribution to the world was a series of videos called The Biggest Ideas in the Universe. The idea was to explain physics in a pedagogical way, concentrating on established ideas rather than speculations, with the twist that I tried to include and explain any equations that seemed useful, even though no prior mathematical knowledge was presumed. I’m in the process of writing a series of three books inspired by those videos, and the first one is coming out now: The Biggest Ideas In The Universe: Space, Time, and Motion. For this solo episode I go through one of the highlights from the book: explaining the mathematical and physical basis of Einstein’s equation of general relativity, relating mass and energy to the curvature of spacetime. Hope it works!

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