Unlike alluvial gold, which is found as very small flakes on riverbanks, gold-bearing rocks have to be dug out of the ground. We're after pure gold, but rock that contains gold also includes lots ...

"The last four months have been a whirlwind for the science team, and we still feel that Witch Hazel Hill has more to tell us ...

prompting scientists to call it a “scientific gold mine.” In the last four months alone, the rover has collected samples from five distinct rocks, examined seven others, and used its laser ...