For decades, scientists have puzzled over why Earth stayed warm and alive while Mars turned cold and dry. Both planets began ...

July 16 stands out in history as a day marked by groundbreaking achievements, pivotal moments in global politics, and ...

"Our work is a new piece of evidence that suggests that Mars was once a much more complex and active planet than it is now." ...

They're not actual spiders, of course, but rather strange geological features.

A new map shows hidden Martian rivers stretching thousands of miles, offering fresh evidence of a warm, wet ancient Mars.

Looks like Mars might have had more water than anyone previously imagined.

In May, the White House released a budget proposal that would slash NASA funding. But a Senate appropriations plan would ...

The thick, mineral-rich layers of clay found on Mars suggest that the Red Planet harbored potentially life-hosting environments for long stretches in the ancient past, a new study suggests.