Well think of newtonian physics. For things humans experience, it's generally plenty. Running, walking, flying, shooting bullets, etc work just fine. Sure la

Well think of newtonian physics. For things humans experience, it's generally plenty. Running, walking, flying, shooting bullets, etc work just fine. Sure lasers, satellites, fission/fusion, astronomy, etc start breaking things. Gravity is damn near perfect on the scale of the solar system. A huge number of zeros of precision, makes great prediction, etc. Even blackholes (which is quite the corner case) seems fine with the current theory of gravity until you get down into the small details and the search for a grand unification of quantum and relativity. However as the scale of a galaxy things break down. So there's at least 2 possibilities. One that the theory of gravity is wrong at large scales, or there's something else involved, like dark matter. Seems natural that scientist have a working assumption that the theory of gravity is right, but the problems with it are getting more attention. There's not just one competing theory for the next step for gravity.