"Human beings can't have evolved on different worlds and ended as a single species."

These researchers are concerned with how human beings evolved to be different from other species.

This is scarcely surprising; human beings have evolved as a social species.

Human beings evolved over the eons to defend themselves against changes in their environment, and things are still changing.

Human beings didn't evolve brains in order to lie around on lakes.

He is working with the Link to help our understanding of how other sentient beings evolve.

Earth is the center of the universe, because it is the place where human beings first evolved.

Human beings evolved with meat as part of their diet.

That's why human beings have evolved an imperfect memory.

They are not mutants, but beings evolved from a baseline human genome over a time period of 6,000 years.