But also within each species we find, just as in humans, variation from group to group.

The miR-941 gene is only found in humans where it first appeared between one and six million years ago.

Viruses that were built like this had not been found in humans or pigs before.

They are commonly found in humans and other species, mostly mammals.

Whether such a population is found in humans is the subject of active investigation.

It can also be found in other animals and humans.

This disease is usually found in humans and bottle-nosed dolphins.

No other cases were found in horses or humans.

A majority of these species are not found in humans.

Dogs and cats best mimic the effects found in humans.