415-million-year-old fossil adds to the growing evidence that sharks are not primitive Ancient fish didn’t look like sharks. Because they lack the bony skeleton common in fish like cod and tuna, ...

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A fossilized cranium of an extinct species of stargazer fish was stuffed with tiny fecal pellets known as coprolites, according to a recent paper published in the journal Rivista Italiana di ...

Add Yahoo as a preferred source to see more of our stories on Google. Hundreds of millions of years ago, jawless fishes swam Earth’s seas, their brains protected on the outside by armored skin, and on ...