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Sir Isaac Newton claimed time flows universally. Albert Einstein said that time is relative to the observer. Theoretical ...

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 ...

A millimeter might not seem like much. But even a distance that small can alter the flow of time. “This is fantastic,” says theoretical physicist Marianna Safronova of the University of Delaware in ...

Albert Einstein's general theory of relativity describes how the fabric of space and time, or spacetime, is curved in response to mass. Our sun, for example, warps space around us such that planet ...

Physicists, mathematicians and philosophers have been exploring the possibility of going forward to the future or back to the ...

LAST month, I answered a reader question about space-time expansion. They wanted to know what space-time is expanding into, given that we scientists tend to analogise with a balloon that is being ...

The most vexing question in physics right now is how general relativity – the laws that govern gravity and space-time on large scales – meshes with quantum mechanics, the laws that govern very small ...