Archaeopteryx, the first known bird

Animal: Archaeopteryx. Archaeopteryx, the first known bird, had a hearing range similar to the modern-day emu's (pictured), according to a new study that boosts the avian claims of this descendant of the dinosaurs.

About the size and shape of a European magpie, Archaeopteryx lithographica appeared on the scene around 150 million years ago, in the Jurassic era.


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