Scientists who eat the plants and animals they study are following in the tradition of Charles Darwin. During the voyage of The Beagle, he ate puma ("remarkably like veal in taste"), iguanas, giant tortoises, armadillos. He even accidentally ate part of a bird called a lesser rhea, after spending months trying to catch it so that he could describe the species. Benjamin Arthur for NPR hide caption

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William Thomson Kelvin (1824 - 1907) who proposed the absolute or Kelvin temperature scale. He also established the second law of thermo-dynamics. He was brilliant. But he wasn't perfect. W. & D. Downey/Getty Images hide caption

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A zygote begins its journey to expression in the form of a human being. Science Picture Co./Science Faction/Getty Images hide caption

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