The Egyptians had the locusts and in the Middle Ages there was the Black Death with the rats, but tourists are the plague of our century and we'll not survive this one.
The natural world is full of females falling hard for stupid male display behavior, including bright feathers, big antlers, and bombastic courtship rituals.
Among environmentalists sharing two or three beers, the notion is quite common that if only some calamity could wipe out the entire human race, other species might once again have a chance.
Large swaths of what we now regard as basic medical knowledge came originally from naturalists.
As an editor, I must often tell writers that their stories "do not fit our present needs." But there are times when I want to reply: "Sir, I would not trust you to write a ransom note."
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