Andy Weir's bestselling story "The Martian" predicts that by 2035 NASA will have landed humans on Mars three times, perfected ...

These cements are the same materials that bind together natural sedimentary rocks ... fully documented and dated example of the complete rapid anthropoclastic rock cycle occurring on land.

These cements are the same materials that bind together natural sedimentary rocks ... The findings represent the first fully documented and dated example of the complete rapid anthropoclastic rock ...

A rock containing many smaller round stones could indicate that there was once a large amount of liquid water on the Red Planet.