Birds -- like anteaters, baleen whales and turtles -- don't have teeth. But this wasn't always the case. The common ancestor of all living birds sported a set of pearly whites 116 million years ago, a new study finds.
Birds -- like anteaters, baleen whales and turtles -- don't have teeth. But this wasn't always the case. The common ancestor of all living birds sported a set of pearly whites 116 million years ago, a new study finds.
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