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A dinosaur ‘belly button’? This 130 million-year-old fossil reveals that—and more | #30 million-year-old fossil

A dinosaur ‘belly button’? This 130 million-year-old fossil reveals that—and more

A dinosaur ‘belly button’? This 130 million-year-old fossil reveals that—and more

This dog-size dinosaur called Psittacosaurus is stunningly well-preserved and has revolutionized paleontologists’ understanding of dinosaur skin.