Earth

A diamond extracted in Botswana confirmed what seismic waves had already suggested: The Earth’s mantle releases water.

Life on Earth won’t end when water evaporates. It will end when plants stop photosynthesizing and the atmosphere rapidly loses oxygen.

The last of NASA's large super-pressure balloons sank into the Pacific Ocean after completing a 17-day journey around the Southern Hemisphere.

It all depends on perspective, although NASA has provided some clues.

Starting in 2030, China will guarantee a human presence in space.

One thing is clear. There will likely be mass extinctions.

The confirmation of an incomplete carbon cycle on Mars has made it clear that a planet’s habitability is fragile.

This time, astronomers are actually hopeful for the impact.

Despite the initial skepticism, Chyba and Hand spent the next nine years developing their electricity-generating device to prove their theory.

There's a new hypothesis regarding the origin of the world's highest mountains.

Space experts have collaborated with the United Nations to monitor the asteroid’s trajectory closely.

Filling the Three Gorges Dam would slightly shift Earth’s axis, increasing the length of the day by 0.06 microseconds.