How gravity continues to puzzle physicists, from Newton's apple to Einstein's spacetime

Gravity, a force understood through Newton's apple and Einstein's spacetime, continues to puzzle physicists despite its familiarity. Newton's law described gravity as a universal attraction, while Einstein's general relativity redefined it as the curvature of spacetime caused by mass and energy. Despite its cosmic influence, gravity is the weakest fundamental force, making it difficult to unify with other forces and understand at quantum levels.