This new species lived around 160 million years ago and sported a strange head crest.
An artistï¿Â1/2s rendition of Guanlong wucaii, the oldest known tyrannosaur. Credit: Zhongda Zhang/IVPP
Paleontologists have unearthed two fossilized ...
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An artistï¿Â1/2s rendition of Guanlong wucaii, the oldest known tyrannosaur. Credit: Zhongda Zhang/IVPP
Paleontologists have unearthed two fossilized ...
More Information