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

The Ultimates have just discovered what the future of their universe has in store for them, and there is nothing good to look ...

If so, they could make the leap to an expanding Universe and the possibility that somewhere out there, farther than they can see, are others like them. The era of star formation is at an end.

Could time itself actually explain our universe's expansion? Our current cosmological model—known as lambda cold dark matter, ...

Einstein's theory of general relativity describes the inevitability of singularities, which are obscured by black holes ...

I know Sony has kept a tight fist on some of these characters, but now that the Sony Spider-Man Universe is apparently ending, I assume the studio might be a little more lenient to lend these ...

Permafrost, a frozen layer rich in organic matter, is degrading due to rising temperatures. By the end of the century, researchers predict significant thawing, releasing carbon into the atmosphere.