Ancient Bird Shakes Up Avian Evolution
The species, dubbed Aurornis xui, is the most primitive bird known.
Dec 27, 2013 6:53 PMNov 12, 2019 5:48 AM
A fossil from the ancient Aurornis xui (left) shows that the bird was the size of a modern-day chicken (right) and could help explain the evolution of birds. | Thierry Hubin/RBINS; Jonica Dos Remedios/RBINS
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