Add Yahoo as a preferred source to see more of our stories on Google. A telescope image of warped yellow starlight forming a smily face against a black background Scientists could soon test Einstein's ...

Timekeeping on the Moon is a trickier problem than you might think. It’s not just the fact that it doesn’t have a diurnal cycle like Earth does — or that one “day” on the Moon is equal to about 29.5 ...

Theoretical physicists have spent decades wrestling with a disorienting possibility: that the flow of time is not woven into the basic laws of physics but instead emerges from gravity’s effect on heat ...

Scientists could soon test Einstein's theory of general relativity by measuring the distortion of time. General relativity states that gravity is the result of mass warping the fabric of space and ...