“This can be clarified,
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, to some extent, with genetic data from ancient people involved in out-of-Africa migrations,” says Lalueza-Fox. So far,
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, though,
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, no such data exist.
The uncertainty highlights the need for more archaeological evidence. Though sites exist in Africa and Europe dating from more than 100,000 years ago to 10,000 years ago, little is known about human excursions into the Arabian Peninsula and the rest of Asia. Uncovering more bones, tools and cultural objects will help fill in the picture of how humans traveled, and what key evolutionary transitions occurred along the way.
Mallick’s team has suggested, for example,
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, that symbolic and ritual behavior mushroomed around 50,000 years ago, in the later part of the Stone Age, due to cultural changes rather than genetic changes. Some archaeologists have proposed that genetic changes must have enabled the flourishing of personal ornaments and artifacts that might have been used in rituals. But comparisons of present-day human DNA to that of Neandertals and extinct Asian hominids called Denisovans don’t support that idea. Instead,
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, another camp argues, humans may have been capable of these behaviors some 200,
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,000 years ago.
Nicholas Conard, an archaeologist at the University of Tübingen in Germany,
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, approaches the findings cautiously. “I do not assume that interpretations of the genetic data are right,
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,” he says. Such reconstructions have been revised and corrected many times over the last couple of decades, which is how “a healthy scientific field moves forward,” Conard adds. Collaborations connecting DNA findings to archaeological discoveries are most likely to produce unexpected insights into where we come from and who we are.

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Since there was no practical reason to turn an effective tool into a chunk of stone that couldn’t cut,
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, Little responds,
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, intentionally dulling the adze’s edge was likely a ritual act. Whatever the meaning,
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, people in Ireland made polished stone tools several thousand years before such implements achieved widespread use in Europe with the arrival of agriculture,
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, Little says.
Excavations in 2001 revealed the Hermitage burial pit. Two small stone tools lay near the polished adze. A couple more burial pits turned up nearby. One contained cremated remains of an adult human from around 9,
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,000 years ago; the other held roughly 8,600-year-old cremated remnants too fragmentary to enable a species identification.
“Hermitage was a special place known about and returned to over hundreds of years,
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,” Little says.
Wed,
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