Modern life often tests the limits of human adaptation.

One of the most visible human adaptations is that of skin color.

They signal an attempt at human adaptation to a dark twist of history.

He attributed this greater difficulty to the human biological adaptation to speech.

Physical anthropology is the study of biological behavior and of human adaptations to the environment.

Cultural ecology is the study of human adaptations to social and physical environments.

This means that while the environment influences the character of human adaptation, it does not determine it.

He has assessed local and regional human adaptations to a harsh and complex environment.

"That's a form of human adaptation called hearing impairment."

Both human adaptations (culture and technology) and the natural environment have changed tremendously over the last 12,000 years.