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 ...

They show up as a mathematical solution in general relativity, basically as a time-reversed version of a black hole. Some ...

“For the last 20 years, people believed that the cosmological constant is positive, and the universe will expand forever,” says Tye, a professor emeritus at Cornell. A positive constant acts like a ...

A physicist proposes that the universe might not be empty but act like a viscous fluid, resisting expansion. This bold idea ...

The shape of the cosmos depends on a balance of two competing forces: the pull of gravity and the expansion driven by dark ...

Human intelligence wasn’t a cosmic evolutionary fluke, some scientists say. The case against cosmic loneliness is growing.

This enormous chain of hundreds of galaxies—a cosmic filament—is twisting through space 400 million light-years away ...

The Hubble and Chandra space telescopes are hunting for rogue black holes wandering through dwarf galaxies, which could ...

The surreal Oscar-nominated short about three animals discovering a mountaintop astronomical observatory blends science and ...

The Standard Model of Particle Physics is the best theory scientists have to explain how the universe works on subatomic ...

The current accepted theory on the creation of our Universe is, of course, "The Big Bang Theory". But cutting edge new work is threatening to replace it with something else, "The Big Bounce Theory." ...

The science communicator, a disciple of Stephen Hawking, believes it will be decades before we colonize Mars. But he says we ...