by Ciro Santilli (@cirosantilli, 37)
It is quite mind blowing that this is polyphyletic on mammals and birds, what can't parallel evolution achieve??
Figure 1.
Phylogenetic tree of the vertebrates
. Source. Highlights how birds should obviously be classified as reptiles.

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  1. Animal
  2. Eukarya subclade
  3. Eukaryote
  4. Species
  5. Taxonomy
  6. Biology
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