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Theories of Evolution
The document discusses theories of evolution including punctuated equilibrium developed by Stephen Jay Gould and Niles Eldredge. Gould was a paleontologist and evolutionary biologist who died in 2002 at age 61. Eldredge worked at the American Museum of Natural History and collaborated with Gould on punctuated equilibrium, which proposes that evolutionary change occurs in short bursts according to fossil evidence. Other theories discussed include phyletic gradualism, the slow steady divergence of species, and cladogenesis, the splitting of a species into different breeds. Key terms defined are species, stasis, isolation, and breed.
