3 votes
2099
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Over the years, researchers have learned a lot about dinosaur anatomy, but there's one feature that keeps eluding us. 

Of all the dinosaur tracks discovered, only a rare few, far less than one percent, show any traces of skin.

It's a serious blindspot, especially when the patterns that this organ makes are like fingerprints, showing unique signatures among dinosaurs.

Finding a perfectly preserved dinosaur 'fingerprint' would be one thing. Paleontologists have now found five.

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Alex
Arizona City, United States
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