Rocks
I'm far from being an expert on this stuff, which is why I usually sit out the Mars discussions, but aren't there blue-green rocks? I have one on my shelf.
Space/Science » in reply to re: re: Why Barry DiGregorio's book will become a classic.
I'm far from being an expert on this stuff, which is why I usually sit out the Mars discussions, but aren't there blue-green rocks? I have one on my shelf.