When you buy through links on our articles, Future and its syndication partners may earn a commission. This artist's concept depicts the early Martian environment (right) with liquid water and a ...

For years, scientists have puzzled over how Mars lost the thick atmosphere it once had. That atmosphere was essential for liquid water to exist on the planet’s surface, billions of years ago. Today, ...

May 29 (UPI) --NASA scientists have discovered evidence that could help answer questions surrounding the history of water loss on Mars. The new research comes after a decade of exploration by NASA's ...

The Moon’s surface is continuously bombarded by the solar wind – a stream of electrically charged particles ejected by the Sun. These high-energy ions can knock atoms out of the Moon’s uppermost layer ...

The moon's thin atmosphere, called an exosphere, has been a puzzle to science for some time. Two main processes were thought to create this wispy gas envelope; tiny meteoroids hitting the surface and ...