A 400, 000-year-old specimen with remnant mitochondrial DNA sequenced and is found to be a common ancestor to Neanderthals and Denisovans, later named " Homo heidelbergensis ".
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This may be connected with the appearance of " Homo heidelbergensis " in the archaeological record at this time who may have contributed this more sophisticated approach.
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The reason for this encephalization is difficult to discern, as the major changes from Homo erectus to Homo heidelbergensis were not associated with major changes in technology.
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The tooth and tibia have been classified as Homo heidelbergensis, a human who lived in the middle part of the Middle Pleistocene age, Dr . Stringer said.
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Flint tools lay scattered around, suggesting the elephant had been cut up by a tribe of the early humans around at the time, known as " Homo heidelbergensis ".
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Later finds of the Mauer sand mine are the "'Hornstein artefacts "', found in 1924 by Karl Friedrich Hormuth, which scholars interpreted as tools of " Homo heidelbergensis ".
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Other classifications of the skull include " Homo heidelbergensis " and evolved " Homo erectus ", but the latter has been disputed by some as having no taxonomic meaning.
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Some suggest Neanderthal, " Homo erectus ", or " Homo heidelbergensis " to be the creature, but no remains of any of those species have been found in the Americas.
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Two hundred thousand year old cranial fragments of a nine year old juvenile found in the cave suggest the presence of either " homo heidelbergensis " or a proto-Neanderthal human.
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This 400, 000-year-old piece fitted with two previously found fragments and is part of the skull of Swanscombe Man, who is now considered to be a specimen of homo heidelbergensis.