Model systems were generalized from the study of simple and related animals to humans.

"You can't just put it together with a closely related animal to see if they interbreed," he explained.

It is an illness affecting Equidae (horses and related animals).

There may be differences in pupil shape even between closely related animals.

Australian Shells, with related animals living in the sea, in freshwater and on the land.

In 1965, the skeleton of a probably closely related animal was found, called Ticinosuchus.

Many human characteristics are also vestigial in other primates and related animals.

He later made her his bride, both being closely related animals (shelled reptiles).

A closely related animal, Trapalcotherium, was described in 2009 on the basis of a single tooth.

They live in social groups of related animals.