The question of how gravity interacts with the quantum world has long perplexed physicists, but a non-quantum theory of space ...

See more of our trusted coverage when you search. Prefer Newsweek on Google to see more of our trusted coverage when you search. Albert Einstein's theory of general relativity—which explains gravity ...

Special and general relativity help us see time, space, and energy in strange new ways. That strangeness seems to remove the theories from our everyday experience. Despite their exotic appeal, ...