Ask Ethan: If Mass Curves Spacetime, How Does It Un-Curve Again?

For hundreds of years prior to Einstein, our best gravitational theory came from Newton. Newton’s concept of the Universe was simple, straightforward, and philosophically dissatisfying to many. He claimed that any two masses in the Universe, no matter where they were located or how far apart they were, would instantaneously attract one another via a mutual force known as gravity. The more massive each mass was, the greater the force, and farther away they were (squared), the lesser the force. This would apply to all objects in the Universe, and Newton’s Law of Universal Gravitation, unlike all the other alternatives put forth, agreed with observations precisely. <a href="https://medium.com/starts-with-a-bang/ask-ethan-if-mass-curves-spacetime-how-does-it-un-curve-again-ce51a391cdc4">Read More</a>