There's been no biological change in humans in 40,000 or 50,000 years.

This energy causes physical, chemical, and biological changes in the soil.

As if she were going through a biological change, maturing into a new species.

You have this huge biological change going on in your body right now.

But biological changes do not explain why extra pounds are a risk for fathers as well.

During its dramatic 4.5 billion year history, Earth has gone through a series of major geological and biological changes.

But if it is a biological change and nothing more, I fear there is little hope.

A number of biological and behavioural changes are dependent on this knowledge.

This led to the lowering of the lake level which has brought about biological changes.