Emerald Tree Boa wrapped around a branch.

How long do new species take to evolve?

Charles Darwin marveled at the “most beautiful and wondrous infinite forms” produced by evolution, and indeed, Earth today abounds with estimated at 1 trillion species. But how long did it take for these species to evolve? The answer varies considerably from one form of life to another, “according to taxa [type of creature] and environmental …

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