Nuts and bolts (general relativity)
= Nuts and bolts (general relativity)
{wiki=Nuts_and_bolts_(general_relativity)}
"Nuts and bolts" in the context of general relativity typically refers to the fundamental concepts, principles, and mathematical tools that form the foundation of the theory. General relativity, formulated by Albert Einstein in 1915, is a cornerstone of modern physics that describes gravity as the curvature of spacetime caused by mass and energy.