Physicists show knotted cosmic strings may have dominated the early universe before collapsing to create matter—a theory ...

For more than a century, physics has been built on two great theories. Einstein's general relativity explains gravity as the bending of space and time. Quantum mechanics governs the world of particles ...

"This is very likely to bring us closer to discovering the true nature of dark energy. Perhaps it will also bring us closer to an understanding of the true nature of black holes" When you purchase ...

Physicists claim they may have found a long-awaited explanation for dark energy, the mysterious force that's driving the accelerated expansion of the universe, a new preprint study hints. Their ...

"It would be amazing if a simple rotation of the universe was the origin of dark energy." What is dark energy? Why does dark energy seem to be weakening? Is our universe part of a larger multiverse?

Fifteen years ago cosmologists were flying high. The simple but wildly successful “standard model of cosmology” could, with just a few ingredients, account for a lot of what we see in the universe. It ...

Daring flights in an old spy plane observe powerful gamma-ray flashes that could help explain the cause of lightning. “These papers are game-changers for the field,” says Joseph Dwyer, a physicist at ...

This article was originally published at The Conversation. The publication contributed the article to Space.com's Expert Voices: Op-Ed & Insights. For more than a century, physics has been built on ...