Physicists are increasingly entertaining a radical possibility: our familiar universe of three dimensions of space and one of time might be only part of a larger structure, with a hidden fifth ...

Dark matter accounts for approximately 85 percent of the universe's mass, yet no instrument has ever caught a direct trace of it. Physicists know it exists because of its gravitational effect on ...

The mysterious substance that binds galaxies together could naturally be 'in tune' with a hidden fifth dimension, according to a new theory aiming to shed light on one of science's biggest enigmas: ...