A rock on Mars spilled a surprising yellow treasure after Curiosity accidentally cracked through its unremarkable exterior.

Because its axis of rotation is tilted at about 25 degrees, Mars has four seasons, just like Earth. However, a year on Mars is about 687 Earth days long, making each season longer than those on ...

When you buy through links on our articles, Future and its syndication partners may earn a commission. A hypothetical picture of Mars 3.6 billion years ago, when an ocean may have covered nearly ...