The atmosphere, a thin veil of molecules enveloping Earth, reaches about 20 miles (32 kilometers) above the planet's surface.

Instead, the universe will begin to contract, like rewinding the clock, and shrink until it comes together in a single point referred to as the "Big Crunch," which would be the mirror image of the ...

In fact, in one scenario, the universe could even re-collapse. There’s a name for that: the “Big Crunch.” Astronomers have revealed amazing wonders in our universe, but some of the most ...

attracting everything back together in a 'Big Crunch'. The nature of dark energy is still a complete mystery, but it is thought to cause the Universe to expand faster all the time. Astronomers ...