In the last 70 years two ideas have dominated the way professional biologists think about species.

In turn it means that adaptive evolution may be faster than biologists had thought.

Many biologists think the smile originated as a sign of fear.

Even biologists think about doing it, though it puzzles them.

In the early twentieth century, biologists thought that proteins carried genetic information.

For a long time, biologists thought they had a simple explanation.

For many years, most biologists thought that it was.

This conjunction of theories also had a large impact on how biologists think about species.

But what do professional biologists think about the basic issues?

Even though the other biologists and scientists thought it was dangerous, I soon wanted to get closer to the wolves really to understand their behaviour.