Can fossil tell us which animals lived at a certian time?

Yes they can because it shows how far back they existed and what blood type they had and what cause them to die out was it the weather, or was it just time for them to go

By studying the fossil record we can tell how long life has existed on Earth, and how different plants and animals are related to each other. Often we can work out how and where they lived, and use this information to find out about ancient environments.