How big would a telescope need to be to see Earth’s dinosaurs from 66 million light-years away? Think big—and then think ...

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 ...

Why Information, Not Matter, May Be the True Foundation of Reality - Rethinking Reality Through Physics, Information, ...

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

Scientists saw a quark plowing through primordial plasma for the first time, offering a rare look at the first moments after ...