Million years ago fossil leakey dating

There was nothing unique about us until we began to make sophisticated stone tools."In other groups of animals many different species evolve, each with new traits, such as plumage, or webbed feet.If the new trait is better suited to the environment then the new species thrives, if not it becomes extinct.They had small heads, prominent brows and stood upright.But 50 years ago, researchers discovered an even older and more primitive species of human called . rudolfensis was around too and raises the distinct possibility that many other species of human also existed at the time.Writing for Scientific American, Kate Wong has a nice commentary on the story that includes several quotes from me, which I thought I could clarify and expand on a bit.

With the discovery of the three new fossils researchers can say with more certainty that H.The close spacing of the footprints is evidence that the people who left them had a short stride, and therefore probably had short legs.It is not until much later that early humans evolved longer legs, enabling them to walk farther, faster, and cover more territory each day. The article has gotten a lot of attention, with stories in the New York Times, two related commentaries in Nature, and I am sure numerous other stories elsewhere. 1), the cranium KNM-ER 1470 has been at the centre of the debate over the number of species of early Homo present in the early Pleistocene epoch(2) of eastern Africa.This singular morphology and the incomplete preservation of the fossil have led to different views as to whether KNM-ER 1470 can be accommodated within a single species of early Homo that is highly variable because of sexual, geographical and temporal factors(4, 5, 6, 7, 8, 9), or whether it provides evidence of species diversity marked by differences in cranial size and facial or masticatory adaptation(3, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20).

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