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 ...

A scientist from the University of Alaska Fairbanks (UAF) has presented a theory according to which time — and not spacetime — would be the only fundamental property in which all physical phenomena ...

Physicists have spent decades treating mass as something the universe simply hands to particles, a property encoded in equations rather than explained from first principles. A new proposal argues that ...