Tiny dinosaur tracks in northwest China could help to trace evolution of birds

Chinese scientists say they have found evidence that chicken-sized dinosaurs lived in what is now Gansu province.

Tiny dinosaur tracks in northwest China could help to trace evolution of birds

Tiny dinosaur tracks in northwest China could help to trace evolution of birds

Tiny dinosaur tracks in northwest China could help to trace evolution of birds

Tiny dinosaur tracks in northwest China could help to trace evolution of birds
Tiny dinosaur tracks in northwest China could help to trace evolution of birds
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