The Pale Blue Dot

That’s here. That’s home. That’s us. Carl Sagan

NASA/JPL-Caltech

One of the hardest concepts for any geology student to really understand is time. On many occasions, I’d be standing on a dark weathered rock outcrop, probably in the rain, listening to a wizened, grey haired, bearded lecturer who at some point would inform us that the black amorphous mass in front of us was 60…