Describes a variety of animals that lived long ago and their evolution into today's species.

The saber-toothed cat was a fearsome prehistoric predator. Written for beginning readers, clear and succinct text explains how we think saber-toothed cats lived

Describes a variety of animals that lived long ago and their evolution into today's species.

What if the neighborhood cat had teeth that measured a foot long? Saber-tooth cats have been extinct for thousands of years, but once upon a time they were the