**Space & time are parts of a whole.** Time and space are different aspects of the quantity spacetime. Gravity has something to do with curvature of spacetime. Curvature is like tracing a shadow of a string suspended above a saddle onto the saddle, then flattening out the saddle. That curvy looking two dimensional line was a straight line in a third dimension. **** # More ## Source - [[A Briefer History of Time]] ## Related - [[4 Fundamental Forces]]