Jurassic bird fossil with dinosaur traits reignites flight origin debate

Paleontologists describe Yuezhuornis yangyuanensis, a 150-million-year-old non-flying bird with dinosaur-like teeth and claws, challenging assumptions about early avian evolution. The fossil's anatomy suggests flight may have evolved later or independently, but the interpretation is contested. This finding could reshape understanding of bird origins, though it has no immediate market impact.

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