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When did Homo sapiens first appear?


A series of morphing skulls, including Australopithecus afarensis, Australopithecus boisei (also known as Paranthropus boisei), Homo erectus, Neanderthals (Homo neanderthalensis) and modern humans (Homo sapiens). (Image credit: Science Photo Library via Getty Images)

The origin of our species, Homo sapiens, has puzzled paleoanthropologists for generations — and finding the answer has only gotten more complicated with the discovery of far-flung fossils and the advent of genetic analysis. So where and when did our ancestors first appear?

Currently, the answer is still up for debate: Researchers have so far unearthed 300,000-year-old fossils attributed to our species, while some scientists trace modern humans’ origins to 1 million years ago. One of the reasons for the lack of clarity is the definition of species itself: what do we mean by Homo sapiens?

What is a species?

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