Board Thread:Fossil Fuels/@comment-28675190-20160906191854/@comment-25238001-20160906202359

Tyrannosaurus Rex2.02456 wrote: There is evidence suggesting it had a third claw from specimen "Pex Rex" but this third claw is small and more like a piece of bone that just protruded from its arm. It is also small so it could easily be lost when the skeleton was being excavated. So what would it be used for and why? Or is "Pex Rex" simply was a mutant? The general consensus for the past hundred years or so has been tht T.rex only had two claws. The tiny third claw on Pex Rex must have been either vestigial bones (like how whale skeletons have tiny back fins), and mutation of some kind, or simply an error on the part of the excavators in identifying what is rock and what is bone