Georges Cuvier was a French naturalist who established extinction as a fact. He also made fun of Jean-Baptiste Lamarck in a famous speech (Lamarck was the acquired-characteristics-being-inherited guy). Let’s face it, Lamarck was a little ridiculous, but Cuvier was kind of a funny guy.
When the French Academy was preparing its first dictionary, it defined crab as, “A small red fish that walks backwards”. This definition was sent to Cuvier for his approval. The scientist wrote back, “Your definition, gentlemen, would be perfect, only for three exceptions. The crab is not a fish, it is not red, and it does not walk backwards.”