How does gravity work? Now that's a straightforward question with a deep answer. Newton did an awfully good job at giving us an answer — the Law of Universal Gravitation that I quoted above.

And law—that is, gravity—would be expected to emerge from these computational rules. We may not yet have definitive evidence that we live in a simulation. But the deeper we look, ...

Up until recently, the Law of Gravity seemed to have no practical implications for the stock market because prices only went higher, just as the sun revolved around the earth until proven otherwise.

MOND, a modified law of gravity, correctly predicted in advance of observations the velocity dispersion -- the average speed of stars within a galaxy relative to each other -- in 10 dwarf ...