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  • Hunter gatherers have/had higher bone density

    From Primum Sapienti@21:1/5 to All on Fri Apr 22 23:36:41 2022
    https://www.cam.ac.uk/research/news/hunter-gatherer-past-shows-our-fragile-bones-result-from-physical-inactivity-since-invention-of

    "New research across thousands of years of human evolution shows that our skeletons have become much lighter and more fragile since the invention of agriculture - a result of our increasingly sedentary lifestyles as we
    shifted from
    foraging to farming.

    "The new study, published today in the journal PNAS, shows that, while human hunter-gatherers from around 7,000 years ago had bones comparable in strength to modern orangutans, farmers from the same area over 6,000 years later had significantly lighter and weaker bones that would have been more
    susceptible to
    breaking.

    "Bone mass was around 20% higher in the foragers - the equivalent to what an average person would lose after three months of weightlessness in space."


    https://www.pnas.org/doi/pdf/10.1073/pnas.1418646112
    Gracility of the modern Homo sapiens skeleton is the
    result of decreased biomechanical loading

    --- SoupGate-Win32 v1.05
    * Origin: fsxNet Usenet Gateway (21:1/5)
  • From [email protected]@21:1/5 to All on Sat Apr 23 00:54:05 2022
    https://www.cam.ac.uk/research/news/hunter-gatherer-past-shows-our-fragile-bones-result-from-physical-inactivity-since-invention-of
    "New research across thousands of years of human evolution shows that our skeletons have become much lighter and more fragile since the invention of agriculture ... hunter-gatherers from around 7,000 years ago had bones comparable in strength
    to modern orangutans ...
    https://www.pnas.org/doi/pdf/10.1073/pnas.1418646112
    Gracility of the modern Homo sapiens skeleton is the
    result of decreased biomechanical loading

    Not "new" but old research, of course.
    Interesting study, but irrelevant as to why H.erectus & partially neandertals were pachy-osteo-sclerotic (as some antelope-running believers believe).
    POS or pachyosteosclerosis (extremely thick & heavy skeletons, possibly more brittle due to an excess of calcium) in tetrapods is exclusively seen in slow & shallow divers, incl. all aquatic mammals initially:
    early Cetacea & pinnipeds had POS, and Sirenia still have POS.
    Google "coastal dispersal Pleistocene Homo PPT" (+ refs).
    Only incredible idiots believe He, Hn or early Hs ran after antelopes.

    --- SoupGate-Win32 v1.05
    * Origin: fsxNet Usenet Gateway (21:1/5)
  • From DD'eDeN aka note/nickname/alas_my_l@21:1/5 to Primum Sapienti on Sat Apr 23 10:33:42 2022
    On Saturday, April 23, 2022 at 1:36:39 AM UTC-4, Primum Sapienti wrote:
    https://www.cam.ac.uk/research/news/hunter-gatherer-past-shows-our-fragile-bones-result-from-physical-inactivity-since-invention-of

    "New research across thousands of years of human evolution shows that our skeletons have become much lighter and more fragile since the invention of agriculture - a result of our increasingly sedentary lifestyles as we
    shifted from
    foraging to farming.

    "The new study, published today in the journal PNAS, shows that, while human hunter-gatherers from around 7,000 years ago had bones comparable in strength to modern orangutans, farmers from the same area over 6,000 years later had significantly lighter and weaker bones that would have been more
    susceptible to
    breaking.

    "Bone mass was around 20% higher in the foragers - the equivalent to what an average person would lose after three months of weightlessness in space."


    https://www.pnas.org/doi/pdf/10.1073/pnas.1418646112
    Gracility of the modern Homo sapiens skeleton is the
    result of decreased biomechanical loading
    Thanks!

    --- SoupGate-Win32 v1.05
    * Origin: fsxNet Usenet Gateway (21:1/5)
  • From Primum Sapienti@21:1/5 to [email protected] on Tue May 10 22:25:27 2022
    [email protected] wrote:
    https://www.cam.ac.uk/research/news/hunter-gatherer-past-shows-our-fragile-bones-result-from-physical-inactivity-since-invention-of
    "New research across thousands of years of human evolution shows that our
    skeletons have become much lighter and more fragile since the invention of >> agriculture ... hunter-gatherers from around 7,000 years ago had bones comparable in strength
    to modern orangutans ...
    https://www.pnas.org/doi/pdf/10.1073/pnas.1418646112
    Gracility of the modern Homo sapiens skeleton is the
    result of decreased biomechanical loading

    Not "new" but old research, of course.
    Interesting study, but irrelevant as to why H.erectus & partially neandertals were pachy-osteo-sclerotic (as some antelope-running believers believe).
    POS or pachyosteosclerosis (extremely thick & heavy skeletons, possibly more brittle due to an excess of calcium) in tetrapods is exclusively seen in slow & shallow divers, incl. all aquatic mammals initially:
    early Cetacea & pinnipeds had POS, and Sirenia still have POS.
    Google "coastal dispersal Pleistocene Homo PPT" (+ refs).
    Only incredible idiots believe He, Hn or early Hs ran after antelopes.


    Hunter gatherers have/had higher bone density, diving not needed.

    --- SoupGate-Win32 v1.05
    * Origin: fsxNet Usenet Gateway (21:1/5)
  • From [email protected]@21:1/5 to All on Fri May 13 12:24:29 2022
    Somebody:

    Hunter gatherers have/had higher bone density, diving not needed.

    My little boy,
    - everybody knows this,
    - everybody also knows that this has 0 to do with pachyosteosclerosis as in H.erectus & slow-swahllo-diving marine tetrapods:
    POS or pachyosteosclerosis (extremely thick & heavy skeletons, possibly more brittle due to an excess of calcium) in tetrapods is exclusively seen in slow & shallow divers, incl. all aquatic mammals initially:
    early Cetacea & pinnipeds had POS, and Sirenia still have POS.
    Google "coastal dispersal Pleistocene Homo PPT" (+ refs).
    Only incredible idiots believe He, Hn or early Hs ran after antelopes.

    --- SoupGate-Win32 v1.05
    * Origin: fsxNet Usenet Gateway (21:1/5)
  • From DD'eDeN aka note/nickname/alas_my_l@21:1/5 to [email protected] on Fri May 13 14:54:29 2022
    On Friday, May 13, 2022 at 3:24:30 PM UTC-4, [email protected] wrote:
    Somebody:
    Hunter gatherers have/had higher bone density, diving not needed.
    My little boy,
    - everybody knows this,
    - everybody also knows that this has 0 to do with pachyosteosclerosis as in H.erectus & slow-swahllo-diving marine tetrapods:
    POS or pachyosteosclerosis (extremely thick & heavy skeletons, possibly more brittle due to an excess of calcium) in tetrapods is exclusively seen in slow & shallow divers, incl. all aquatic mammals initially:
    early Cetacea & pinnipeds had POS, and Sirenia still have POS.
    Google "coastal dispersal Pleistocene Homo PPT" (+ refs).
    Only incredible idiots believe He, Hn or early Hs ran after antelopes.
    ??
    Gathering seaweed, oysters, mushrooms, pineapples...

    --- SoupGate-Win32 v1.05
    * Origin: fsxNet Usenet Gateway (21:1/5)
  • From [email protected]@21:1/5 to All on Sat May 14 00:52:33 2022
    Op vrijdag 13 mei 2022 om 23:54:30 UTC+2 schreef DD'eDeN aka note/nickname/alas_my_loves:

    ...
    - everybody also knows that this has 0 to do with pachyosteosclerosis as in H.erectus & slow-swahllo-diving marine tetrapods:
    POS or pachyosteosclerosis (extremely thick & heavy skeletons, possibly more brittle due to an excess of calcium) in tetrapods is exclusively seen in slow & shallow divers, incl. all aquatic mammals initially:
    early Cetacea & pinnipeds had POS, and Sirenia still have POS.
    Google "coastal dispersal Pleistocene Homo PPT" (+ refs).
    Only incredible idiots believe He, Hn or early Hs ran after antelopes.

    ?? Gathering seaweed, oysters, mushrooms, pineapples...

    -He: extreme POS, 800 cc small PNSs: diving, seacoasts
    -Hn: moderate POS, 1400 cc, large PNSs: seasonally following rivers inland? -Hs: no POS, 1300 cc, intermediate PNSs: wading-walking

    Hn: shellfish, seaweed? salmon? ...
    In any case: only incredible idiots believe He, Hn or early Hs ran after antelopes.

    --- SoupGate-Win32 v1.05
    * Origin: fsxNet Usenet Gateway (21:1/5)