We’ve been told by science that the universe is expanding relentlessly, driven by a mysterious force called dark energy.

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Add Yahoo as a preferred source to see more of our stories on Google. Dark energy is one of the most mysterious concepts in all of the cosmos. We know very little about what it is but it just might ...

We know how the universe began. An event we call the Big Bang started it all about 13.8 billion years ago. How the universe ends, though, is an open question. The path forward depends on the ...

The expansion could stop in about 11 billion years, with the universe then contracting to a final collapse 20 billion years ...

For centuries, people have looked to the stars, asking how it all began—and how it might end. Now, thanks to a bold new study by physicists from Cornell University, Shanghai Jiao Tong University, and ...

New data from major dark-energy observatories suggest the universe may not expand forever after all. A Cornell physicist calculates that the cosmos is heading toward a dramatic reversal: after ...

If you’re having trouble sleeping at night, have you tried to induce total existential dread by contemplating the end of the entire Universe? If not, here’s a rundown of five ideas exploring how “all ...