A mighty river once coursed through what is now the Sahara Desert, one of the driest and most inhospitable places in the world, scientists said. A satellite that can peer beneath the desert sands ...

With an abundant supply of liquid water, Earth is one of the few places in the universe where life can develop and flourish. But scientists have long wondered where exactly all of our life-giving ...

Planetologists at the University of Münster (Germany) have now been able to show, for the first time, that water came to Earth with the formation of the Moon some 4.4 billion years ago.

Understanding how water arrived on Earth is a key part of understanding how and when life evolved here as well. But we don’t even know how it where it came from.

If this were the case, then the chemical signature of Earth’s water would match what is found on comets. Water, of course, is H 2 O: two parts hydrogen and one part oxygen. It can be made from ...