When did abundant fossil evidence first appear in the geologic record?

300 million years ago

540 million years ago

5 billion years ago

3 billion years ago

Based on what you know about the location of the earth in relation to the sun, why is this called the goldilocks zone in other galaxies? a. it's a region that exhibits a weak gravitational pull, thus maintaining a safe distance from the sun. b. it's an area that doesn't experience any major weather events that could cause mass extinctions. c. it's an area that's an optimal distance from the sun for potentially supporting life. d. it's a region that's unaffected by asteroid or meteor impacts.

What was the role of european colonies during the industrial revolution

How did geography influence the settlement of early africa.