Birds 'Lost Their Teeth' Over 100 Million Years Ago, Scientists Say

December 16, 2014 3:17 PM

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Birds 'Lost Their Teeth' Over 100 Million Years Ago, Scientists Say

Ever since a fossil of the ancient bird Archaeopteryx was discovered in 1861, scientists have known that avian ancestors once had teeth while birds today lack those pearly whites. But when birds "lost their teeth" has remained a mystery -- until now.

For the study, the researchers examined the genomes of 48 living bird species, taking a close look at six genes associated with tooth formation.

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