Answer:
They show us that creatures before us, more feral, had lived and went extinct. And it also shows us the progression of fossils. (Evolution)
Step-by-step explanation:
Scientists conclude the data of fossils, like the Jurassic age. Tyrannosaurus rexes were massive, carnivorous creatures. As scientists look at this data and go through the fossil records to show how we have evolved into modern people today.