We see a lot of them now since the flood here at the nature center because there's not a lot of habitat left.

Real progress in understanding nature is rarely incremental. All important advances are sudden intuitions, new principles, new ways of seeing.

It's all managed and backed up and stored in Eugene -- and that's all behind locked doors.

Any time your work can be criticized by the public you get a little nervous.

Sex is a part of nature. I go along with nature.

Nowhere in this country, from sea to sea, does nature comfort us with such assurance of plenty, such rich and tranquil beauty as in those unsung, unpainted hills of Pennsylvania.