Astrophysicists have presumed for nearly a century that the universe will just keep expanding for all eternity, driven by an ...

If ultimately true, the universe will reach its maximum size around 11 billion years from now. At that point, physics (and ...

This hypothesis is not new. It was given the affectionate nickname of Big Crunch, and says that the accelerated expansion of ...

We’ve grown up with the idea that the universe will expand forever, meaning the "cosmological constant" is positive. What if ...

For centuries, humanity has pondered the ultimate fate of the universe. From theories of infinite expansion to the concept of ...

The bold question-askers at What If investigate what would happen if the universe stopped expanding. Pete Hegseth gets Navy ...

The universe is approaching the midpoint of its 33-billion-year lifespan, a Cornell physicist calculates with new data from ...

What if the universe remembers? A bold new framework proposes that spacetime acts as a quantum memory. For over a hundred ...

According to the equations that govern black holes, the larger one of these cosmic behemoths is the lower its average density ...

The Alien franchise works because it traps its characters in impossible situations where survival depends on cunning, luck, ...

For science-fiction enthusiasts, that’s a bit depressing. Space is big, and while the speed of light is incredibly fast to us ...