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RE: FEATHERS FOR T-REX?
Being such big animals, the only way I can imagine adult tyrannosaurs
have a thick coating of protofeathers would be if they lived in a cold
climate (like woolly mammoths did). The evidence is completely contrary to
this, and an animal that size in a warm climate would have had severe
problems with heat dissipation. Skin impressions also argue against adult
tyrannosaurs having a substantial covering of protofeathers.
However, it would not surprise me if they had such a covering on the
back end (rump and tail), especially during brooding of eggs, assuming that
they directly brooded their eggs in some manner. If not, protofeathers
would have been useless except possibly for display (sexual or aggressive).
Another two cents worth,
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