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Why did the big beasties go away? Rate Topic: -----

#41 24 January 2012 - 04:21 AM Santalum 


Baryon

View PostMoontanman, on 23 January 2012 - 03:48 PM, said:

more efficient respiratory systems might have helped as well.


Interesting!. I have never come across anything like that before. How was it more efficient?
0

#42 25 January 2012 - 02:43 AM Moontanman 


Scientist

View PostSantalum, on 24 January 2012 - 04:21 AM, said:

Interesting!. I have never come across anything like that before. How was it more efficient?



Dinosaurs had respiratory systems like birds, they do not draw air in and right back out like mammals and reptiles do. Air is circulated around and out instead of in and out, it means that oxygen better extracted and CO2 is exhausted.

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