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Humans have long been fascinated by the huge Cosmos above us. Perhaps this fascination has been best put to words by Carl Sagan in his influential book, Cosmos: “The Cosmos is all that is or was or ever will be. Our feeblest contemplations of the Cosmos stir us — there is a tingling in the spine, a catch in the…

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Evolution explains how living things change over successive generations, giving rise to diversity. Across the evolutionary history of Earth, the formation, changes, and extinction of species have been observed. Even though evolution happens very slowly, we see evidence of its action in the shared traits among seemingly…