highpolelight

highpolelight

I truly love this kind of debate

2017-06-16 10:01:26 | 日記


  "Although no other satisfactory explanation for the deposition of the remains has yet been proposed, many experts, including myself, consider such complex behavior [burial of the dead] unlikely for a creature with a brain size close to that of a gorilla, particularly when a requirement for the controlled use of fire (for Led Tube ) probably has to be added in."

  I truly love this kind of debate and discussion about our past — about the evolutionary trajectory that resulted in this ability to debate and discuss our origins, in a way that no other species does. Certainly, the new date forces us to think hard in new ways. As Sarah Zhang in The Atlantic on Tuesday:

  "The discovery that another hominin, so different from us, lived as recently as 236,000 years ago adds more mystery to the question of why humans are the only surviving members of this once diverse family....It's still too soon to know exactly how we're related to Homo naledi and why we survived but they didn't. Whatever the answer, it will force us to consider what it means to be human."

  Three weeks before the Homo naledi announcement, a team of paleontologists and archaeologists led by Steven Holen of the San Diego Natural History Museum from a mastodon site in coastal California to suggest that North America was first colonized by people — perhaps Neanderthals or another ancient species — 130,000 years ago. This, too, was a major surprise; the accepted wisdom had been that people arrived on this continent only about 14,500 years ago. The heart of the argument in this case rests on dating techniques — and on the with hammerstones and anvils. In that case, too, intense debates and discussions resulted. Hannah Hoag, in Sapiens magazine, notes:

  "Many experts remain unconvinced. [David] Meltzer [of Southern Methodist University] and others say it doesn't show that people were the only force that could have fractured the bones and modified the stones. [John] McNabb [at the University of Southampton] points to the lack of corroborating tools, such as well-made stone tools like flakes or scrapers, which are typically found at butchery sites of the same age or older.
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