Early Bird Species Had Four Wings, Scientists Find
Some bird species had a four-wing body plan before they lost hind-limb feathers and started to use those limbs to walk, scientists reported Thursday. [Source]
Publication Date:Origin: nytimes.com
Category: Paleontology
Topics: reported, scientists, limbs, those, started, feathers, hind-limb, four-wing, species, Scientists, Wings, Species, Early