Charles Darwin had a theory. A theory that people and animals could evolve by growing, changing and adapting to their conditions. Evolution, now widely known and accepted throughout the world of science, still has many unknown factors, and how certain things evolve is still being studied. How proteins evolve from having one function to multiple functions, and how RNA molecules evolve from being unimportant to having vital roles in cell regulation are a few of the things that scientists are still researching. (Image courtesy of Wikimedia Commons)
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