Extinct monitor lizard had four eyes, fossil evidence shows

Researchers reporting in Current Biology on April 2 have evidence that an extinct species of monitor lizard had four eyes, a first among known jawed vertebrates. Today, only the jawless lampreys have four eyes.

Ancient fish illuminates one of the mysteries of childhood

Remember dropping your milk teeth? After a lot of wiggling the tooth finally dropped out. But in your hand was only the enamel-covered crown: the entire root of the tooth had somehow disappeared. In a paper published in Nature, ...

Two-faced fish clue that our ancestors 'weren't shark-like'

An investigation of a 415-million-year-old fish skull strongly suggests that the last common ancestor of all jawed vertebrates, including humans, was not very shark-like. It adds further weight to the growing idea that sharks ...

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