<span>The pope required that the monarchs make them convert to Christianity.</span>
One simple and easy way that scientists can accurately date fossils found is through the ground levels. When you take a big chunk out of the earth, you can see the changes in the texture in the "ground" Each "layer" represents a set of years. And as you get further and further into the ground, fossils become older and older.
Much pollution fills the air because of train s which let off steam that contains chemicals.
