Search until you find a passion and go all out to excel in its expression.

I will argue that every scrap of biological diversity is priceless, to be learned and cherished, and never to be surrendered without a struggle.

You teach me, I forget. You show me, I remember. You involve me, I understand.

The history of life on earth has been a history of interaction between living things and their surroundings.

I had in mind a message, although I hope it doesn't intrude too badly, persuading Americans, and especially Southerners, of the critical importance of land and our vanishing natural environment and wildlife.

The extinctions ongoing worldwide promise to be at least as great as the mass extinction that occurred at the end of the age of dinosaurs.

The closer the genetic relationship of the family members, as for example father-to-son, as opposed to uncle-to-nephew, the higher the degree of cooperation.