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New discovery of Home erectus shows early stage in brain development.

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  • New discovery of Home erectus shows early stage in brain development.

    More and more fossils are being found for critical intermediate period of the evolution of primates from earlier primates to the diversity of sapiens that represent the immediate ancestors of humans. The fossil evidence describes a diverse subspecies and species of Australpithecus, Homo erectus, and Homo Habilis between 250,000 and 4,000,000 years ago.Earlier discoveries described them as two species, but more recent discoveries have found that the represent a diversity of species, subspecies, and varieties that have a range of physical properties such as brain size and development. They also lived in Africa at the same time. Australpithecus lived from ~4.2 million years to 1 million years ago. By the evidence the more advanced Homo Erectus lived from ~2 million to 250,000 years ago and Homo Habilis lived from ~2 million the earliest tool maker.

    The following discovery adds to the discoveries of the diversity of our ancestors in this period.

    Source: https://www.upi.com/Science_News/2020/04/03/Fossil-suggests-Homo-erectus-is-200000-years-older-than-thought/2031585939989/



    Fossil suggests Homo erectus is 200,000 years older than thought
    By
    Brooks Hays
    [​IMG]

    Scientists unearthed the world's oldest Homo erectus cranium in South Africa. Photo by Angeline Leece
    [​IMG]

    April 3 (UPI) -- Paleontologists have unearthed the oldest fossil belonging to the hominin species Homo erectus.

    The 2 million-year-old fossil skull, excavated over a five-year period in South Africa, suggests the early human relative emerged between 100,000 and 200,000 years earlier than previously thought.

    Scientists described the discovery in a new paper published this week in the journal Science.

    "The Homo erectus skull we found, likely aged between 2 and 3 years old when it died, shows its brain was only slightly smaller than other examples of adult Homo erectus," lead study author Andy Herries, research professor and head o the the archaeology and history department at the La Trobe University in Australia, said in a news release.

    Using high-resolution dating methods, scientists confirmed the fossil cranium is at least 2 million years old, which means Homo erectus shared the African continent with at least two other hominin species, Paranthropus robustus and Australopithecus sediba.

    "Unlike the situation today, where we are the only human species, 2 million years ago our direct ancestor was not alone," Herries said.

    Because the skull predates fossils from other Homo erectus both inside and outside of Africa, scientists suggest the discovery proves Homo erectus emerged and evolved in Africa -- not Asia, as has been previously been suggested.

    "Our discovery suggests, though, that Homo erectus likely did not evolve in eastern Africa as so often thought but perhaps somewhere else in Africa, or potentially in South Africa itself," researchers wrote in The Conversation. "More evidence is needed before firm conclusions can be reached, of course."

    The dig site that produced the ancient skull, the Drimolen Fossil Hominin site located northeast of Johannesburg, has yielded a variety of significant hominin fossils. Analysis of additional fossils by an international team of scientists is ongoing.

    The ongoing research suggests southern Africa presented hominins a variety of challenges, which may explain why each of the three hominin species living in the region evolved very different adaptations.

    RELATED Earliest evidence of hominin interbreeding revealed by DNA analysis


    The remains recovered from the Drimolen Fossil Hominin site offer a snapshot of the complex experimentation that defined early human evolution. Some of those early experiments were more successful than others.

    "One of the questions that interests us is what role changing habitats, resources, and the unique biological adaptations of early Homo erectus may have played in the eventual extinction of Australopithecus sediba in South Africa," said study co-author Justin Adams, researcher at Monash University's Biomedicine Discovery Institute.

    "Similar trends are also seen in other mammal species at this time. For example, there are more than one species of false sabre tooth cat, Dinofelis, at the site -- one of which became extinct after two million years," Adams said. "Our data reinforces the fact that South Africa represented a truly unique mixture of evolutionary lineages -- a blended community of ancient and modern mammal species that was transitioning as climates and ecosystems changed."

    © Copyright Original Source

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    Hotspur: Why, so can I, or so can any man;
    But will they come when you do call for them? Shakespeare’s Henry IV, Part 1, Act III:

    go with the flow the river knows . . .

    Frank

    I do not know, therefore everything is in pencil.

  • #2
    Cool.

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