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  • long nose = large sinus: elephant>tapir>swine, semi-aquatic fresh-water

    From [email protected]@21:1/5 to All on Wed Oct 26 11:45:13 2022
    Sinuses offer new way of studying the evolution of ancient humans
    James Ashworth https://phys.org/news/2022-10-sinuses-evolution-ancient-humans.html

    _____

    google "paranasal sinus verhaegen"

    --- SoupGate-Win32 v1.05
    * Origin: fsxNet Usenet Gateway (21:1/5)
  • From [email protected]@21:1/5 to All on Thu Oct 27 04:30:40 2022
    Sinuses offer new way of studying the evolution of ancient humans
    James Ashworth https://phys.org/news/2022-10-sinuses-evolution-ancient-humans.html
    _____

    google "paranasal sinus verhaegen"

    In mammals, there's a very strong correlation between PNS size & nose length: both traits lengthen the nostril->lung distance.
    Elephants, swine, tapirs & neandertals are terrestrial: not aquatic (any more), but live in (esp. fresh-)watery milieus or have to cross rivers sometimes.

    PNS (& nose?) size Hn>Hs>He.
    This suggest He still dived frequently, but Hn much less:
    Hn very large PNSs (anterior skull) but pachy-osteo-sclerotic occiput (posterior skull) suggest frequent back-floating (for opening shellfish cf. sea-otter?).
    Hn ear exostoses & POS show they still spent a lot of time (seasonally??) diving.

    --- SoupGate-Win32 v1.05
    * Origin: fsxNet Usenet Gateway (21:1/5)
  • From [email protected]@21:1/5 to All on Fri Oct 28 13:56:05 2022
    Sinuses offer new way of studying the evolution of ancient humans
    James Ashworth https://phys.org/news/2022-10-sinuses-evolution-ancient-humans.html
    ____

    google "paranasal sinus verhaegen"

    In mammals, there's a very strong correlation between PNS size & nose length: both traits lengthen the nostril->lung distance.
    Elephants, swine, tapirs & neandertals Hn are terrestrial: not aquatic (any more), but live in (esp. fresh-)watery milieus, or have to cross rivers sometimes.
    PNS (& nose?) size Hn>Hs>He.
    This suggest He still dived frequently, but Hn much less:
    Hn very large PNSs (anterior skull) but pachy-osteo-sclerotic occiput (posterior skull) suggest frequent back-floating (for opening shellfish cf. sea-otter?).
    Hn ear exostoses & POS show they still spent a lot of time (seasonally??) diving.

    There's 0 doubt Hn often dived for aquatic food: they had ear exostoses (cold water irrigation), POS (slow+shallow diving), huge brains (DHA) etc.
    Their large noses & extensive PNSs suggests freshwater & spending a lot (most?) of time outside the water.
    I still don't know: did they follow the salmon seasonally?

    --- 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 Sat Oct 29 08:01:03 2022
    On Friday, October 28, 2022 at 4:56:06 PM UTC-4, [email protected] wrote:
    Sinuses offer new way of studying the evolution of ancient humans
    James Ashworth https://phys.org/news/2022-10-sinuses-evolution-ancient-humans.html
    ____
    google "paranasal sinus verhaegen"

    In mammals, there's a very strong correlation between PNS size & nose length: both traits lengthen the nostril->lung distance.
    Elephants, swine, tapirs & neandertals Hn are terrestrial: not aquatic (any more), but live in (esp. fresh-)watery milieus, or have to cross rivers sometimes.
    PNS (& nose?) size Hn>Hs>He.
    This suggest He still dived frequently, but Hn much less:
    Hn very large PNSs (anterior skull) but pachy-osteo-sclerotic occiput (posterior skull) suggest frequent back-floating (for opening shellfish cf. sea-otter?).
    Hn ear exostoses & POS show they still spent a lot of time (seasonally??) diving.
    There's 0 doubt Hn often dived for aquatic food: they had ear exostoses (cold water irrigation), POS (slow+shallow diving), huge brains (DHA) etc.
    Their large noses & extensive PNSs suggests freshwater & spending a lot (most?) of time outside the water.
    I still don't know: did they follow the salmon seasonally?
    Still chasing those long-nosed saiga...

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