Latest Martian spherules Stories
NASA's veteran rover Opportunity has sent back an image of the Martian surface that is pretty alien compared to what researchers are used to seeing.
Researchers are reporting in the journal Nature that tiny "spherules" embedded in layers of rock have given them details about Earth's asteroid impacts.
One of NASA's two Mars rovers has recorded a compelling saga of environmental changes that occurred over billions of years at a Martian crater.
- The word or words serving to define another word or expression, as in a dictionary entry.