Posted on 01/01/2019 10:42:10 AM PST by lasereye
Feathers... as in down... also make great insulation for warm-blooded creatures. That and secondary sexual displays for mating. Point is that flight is not the only reason to have feathers.
They came both ways.
The ones without feathers morphed into Republicans.
The ones with feathers morphed into birdbrains and then into Democrats.
POLLY MUST HAVE A TON OF CRACKERS, RAAAAARGH!!!
Feathered dinos just aren’t as fearsome. I grew up with dinos being fearsome for the most part. The nearest thing we have to living dinos are crocs and komodo dragons. Neither have feathers.
There is apparently a particular kind of keratin in feathers.
Are ‘t they just finding impressions of feathers? Fossils are ‘t bone, per se. They’re mineral cast s where bone once existed. I wouldn’t think keratin would last millions of years.
The presumption is that proto-feathers provided warmth, thus being quite advantageous for warm-blooded dinosaurs. Surprisingly, they seem to be a basal trait, lost to the truly giant dinosaurs, but this makes sense since heat conservation is less critical to the more massive dinosaurs.
You cross section dinosaur bones and you get marrow like mammals and birds, not reptiles.
Reptile bones have no marrow? Did not know that.
Yes. Unequivocally, yes.
Warm blooded marrow is different from cold blooded marrow. You can call the paleontologist at Cleveland Lloyd Dinosaur quarry and argue with him.
“Did Dinosaurs Come with or without Feathers?”
yes.
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