Category talk:Start-Class Palaeontology articles

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Palaeontology question of size.[edit]

I have been fascinated by this subject and would ask all you palaeontologists,why so many of these creatures were so large? It seems obvious to me that something changed,eg atmospheric pressure maybe or something like that. I would appreciate your views or theories regarding this specific issue. Thankyou — Preceding unsigned comment added by 86.167.104.1 (talk) 21 February 2010