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 ...

“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 ...

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

Physicist Sean Carroll explains how physics, astronomy, philosophy, and classics all help us understand the expanding ...

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

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

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

You might think galaxies can’t ever find each other in our runaway cosmos, but it turns out gravity can sometimes overcome ...

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." ...

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

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

Isaac Asimov's 1955 novel The End of Eternity was adapted into a trippy movie in 1987, and you can watch it for free right ...