From the earliest stages of feather evolution keratin scales becoming fine filaments of down helped therapsid dinosaurs insulate against cold

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From the earliest stages of feather evolution keratin scales becoming fine filaments of down helped therapsid dinosaurs insulate against cold in desert environments

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Size: 5200px × 3467px
Location: Scarborough, UK
Photo credit: © Nick Greaves / Alamy / Afripics
License: Licensed
Model Released: No

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