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In November 1915, Albert Einstein presented his general theory of relativity to a bewildered Prussian Academy of Sciences in Berlin, the theory that revolutionized our view of the universe.
Einstein’s theory reframed the idea of gravity in a completely novel way, profoundly different from the then accepted theory, created by Isaac Newton in 1686. Newton’s theory worked beautifully describing a host of gravitational phenomena, from the orbits of planets and comets around the sun to the tides and the oblateness of the Earth. (The Earth is an oblate spheroid — that is, slightly flattened at the poles.) Rocket engineers still use Newton’s theory to calculate their paths to reach other worlds in the solar system. The theory only begins to fail when gravitational forces are extremely strong, far from our everyday lives. But its premise, Einstein discovered, albeit an excellent approximation, is profoundly wrong.
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