Einstein reimagines gravity as geometry, guided by equivalence, culminating in general relativity's field equations.
Newton's absolute space and instantaneous gravity are the starting picture with visible cracks.
Free-fall weightlessness inspires the equivalence principle, linking gravity to acceleration.
Riemannian geometry and tensors provide the language to describe curved spacetime.
The draft theory yields partial covariance and wrong Mercury precession, fueling doubt.
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