Wormholes may be lurking in the universe--and new studies are proposing ways of finding them

Albert Einstein's theory of general relativity profoundly changed our thinking about fundamental concepts in physics, such as space and time. But it also left us with some deep mysteries. One was black holes, which were only unequivocally detected over the past few years. Another was "wormholes"--bridges connecting different points in spacetime, in theory providing shortcuts for space travelers.