Gravitational distortions produced by distant galaxies show a slight—but notable—disagreement with Einstein's predictions.

Einstein received the Nobel Prize for one of the other ideas, but the special theory of relativity has since become the most well-known, perhaps of his career or even the entire field of physics!

General relativity is physicist Albert Einstein's understanding of how gravity affects the fabric of space-time. The theory, which Einstein published in 1915, expanded the theory of special ...