mammals

Wolves are predators that hunt and kill large mammals, such as deer. During the season that they rear their pups, they kill prey and bring it back to their den for their pups to eat.

Some animals go to great lengths to exfoliate. Some scientists think that the reason some whale species make their long migration is to shed their skin, not to feed or give birth.

A cockroach species in Hawaii called the Pacific beetle cockroach can actually give milk. This isn't the only thing this cockroach has in common with mammals, either. It also gives birth to live young.

The main difference between hair and fur is where it grows, not what it's made of. Hair length is a trait that's specific both to you as an individual, and to your species.

How do people recognize faces? Is it a special ability that relies on custom circuitry in the human brain? Or, do we learn it with the same brain circuitry that we use to recognize other objects?