Water

Researchers using a giant electromagnet suspended from a helicopter have created a detailed map of the hydrothermal system underneath Yellowstone National Park for the first time.

A new image from the Landsat 8 satellite shows the contrast of artificial snow against an otherwise snowless mountain at the Winter Olympics in China.

New evidence finds substantial water on Mars flowed as recently as 2 billion years ago.

Here's how much water is in Earth's atmosphere at any one time.

Samples from asteroid Itokawa collected by a Japanese space probe suggest that Earth's water may have come from the sun.

Martian 'blueberry' stones may hold evidence of the planet's watery past, a new study of similar minerals on Earth suggests.

In a new experiment, scientists turned water into a shiny, yellowish metal.

Wally has been stirring up mischief by lounging on lifeboat slipways and capsizing passing dinghies, but conservation groups have warned tourists not to get too close.

Scientists analyzed the hearts of retired astronaut Scott Kelly after he spent time in space and elite endurance swimmer Benoît Lecomte after he swam the Pacific Ocean.