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Everyone has their own theory of evolution, yet some are more complex and can explain more about the current creatures on Earth. All of the evolutionary theories say partially the same thing, that life changes over time, but there are also many explanations as to how that happens. For instance, the theory of Charles Darwin and the theory of John Babtiste Lemarck differ in many ways. Studying in the Galapagos Islands, Darwin came up with his theory. His theory was completely about survival of the fittest. Darwin believed in natural selection, a species being chosen for or against. Those creatures cho