NASA's Perseverance rover on Mars has discovered unusual "float" rocks on the rim of Jezero Crater while searching for signs ...

NASA’s Perseverance rover has found a never-before-seen dark rock named Skull Hill in Jezero Crater, offering new clues about ...

Yellowstone Caldera, the volcanic complex underneath Yellowstone National Park, is held at bay from eruption by a cap 3.8 ...

Skull Hill is a type of "float" rock — one that likely originated elsewhere and was transported to its current location.

This false-color satellite photo from 2014 shows the immense heat emanating from lava lakes at the summits of a pair of ...

NASA has found a rock on Mars that it has dubbed Skull Hill. The rock is known as a "float rock," and NASA has no idea where ...