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Re: Spinosaurus dorsal sail function riddle



 Not sure I understand the item below.  I just went to the website and 
downloaded the paper with no problem or fee.
 
Clair Russell Ossian, PhD 
Professor of Geology, Emeritus 
Tarrant County College 
2805 Raintree Drive 
Carrollton, Texas 75006

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On 11/17/15, Jaime Headden<jaimeheadden@gmail.com> wrote:
 
>From the website:

"Copyright ?? Cambridge University Press 2015 This is an Open Access
article, distributed under the terms of the Creative Commons
Attribution licence (http://creativecommons.org/licenses/by/4.0/),
which permits unrestricted re-use, distribution, and reproduction in
any medium, provided the original work is properly cited."

But to access it, they are asking for $45.00, or ??30.00.

"OA" my foot.

On Tue, Nov 17, 2015 at 6:37 AM, Jaime Headden <jaimeheadden@gmail.com> wrote:
> Until they realize that the nearly solid bones of the sail are
> counter-intuitive to flotation, as argued by Sereno at this years'
> SVP, and in general contradiction to previous arguments for a bouyant,
> crocodilian-like surface swimmer.
>
> On Tue, Nov 17, 2015 at 6:26 AM, Ben Creisler <bcreisler@gmail.com> wrote:
>> Ben Creisler
>> bcreisler@gmail.com
>>
>> A new paper:
>>
>> Jan Gimsa, Robert Sleigh and Ulrike Gimsa (2015)
>> The riddle of Spinosaurus aegyptiacus' dorsal sail.
>> Geological Magazine (advance online publication)
>> DOI: http://dx.doi.org/10.1017/S0016756815000801
>> http://journals.cambridge.org/action/displayAbstract?fromPage=online&aid=10036572&fulltextType=RC&fileId=S0016756815000801
>>
>> Spinosaurus aegyptiacus was probably the largest predatory dinosaur of
>> the Cretaceous period. A new study shows that it was a semiaquatic
>> hunter. The function of Spinosaurus??? huge dorsal ???sail??? remains
>> unsolved, however. Three hypotheses have been proposed: (1)
>> thermoregulation; (2) humpback storage; or (3) display. According to
>> our alternative hypothesis, the submerged sail would have improved
>> manoeuvrability and provided the hydrodynamic fulcrum for powerful
>> neck and tail movements such as those made by sailfish or thresher
>> sharks when stunning or injuring prey. Finally, it could have been
>> employed as a screen for encircling prey underwater.
>
>
>
> --
> Jaime A. Headden
> The Bite Stuff: http://qilong.wordpress.com/
>
>
> "Innocent, unbiased observation is a myth" - P. B. Medawar (1969)



-- 
Jaime A. Headden
The Bite Stuff: http://qilong.wordpress.com/


"Innocent, unbiased observation is a myth" - P. B. Medawar (1969)