Add Yahoo as a preferred source to see more of our stories on Google. When you buy through links on our articles, Future and its syndication partners may earn a commission. The NASA/ESA Hubble Space ...

"There was a time when ‘universe' meant ‘all there is,' " writes Greene, but soon we may have to redefine that word, along with our own meager understanding of the cosmos. A theoretical physicist and ...

Einstein’s general theory of relativity was confirmed one hundred years ago today. Go to take a theatrical journey with physicist Brian Greene and explore this discovery in light falls on PBS. Hank ...