Based on evidence of the redshift of stars and galaxies, scientists know that the universe is expanding. The redshift shows that galaxies outside the Milky Way is moving away from us. The farther the galaxy is the faster it is moving away.
Answer:
plate tectonics which collide every time a earthquake occurs
Explanation:
Explanation:
Bugs, chemicals, and all sorts of other stuff could be in the water if it isn't filtered out, and that could be a major problem for people.
The answer is ... 16 I think
Answer:
Our best guesses are that life began somewhere between 3.5 Billion and 3.8 Billion years ago