Scientists utilized 3D X-ray imaging to uncover new details that challenged previous ideas about prehistoric marine life.

A 300-million-year-old tentacled sea creature has lost its crown as the world’s oldest octopus, after scientists found evidence that it’s not an octopus at all.

The ancient cephalopod, Nanaimoteuthis haggarti, appears to have been an apex predator that rivaled mosasaurs to rule prehistoric seas.

For more than 25 years, a small, soft-bodied fossil pulled from an Illinois coal mine held a remarkable title: the world’s oldest known octopus. That title is now gone. A team of researchers, led by ...

The fossil, found by Jay Anderson in a Steele County gravel pit, was identified as belonging to the genus Endoceras, from the Paleozoic Era. Michael Kjelland (left), a professor from Mayville State ...

LONDON (AP) — A 300-million-year-old tentacled sea creature has lost its crown as the world’s oldest octopus, after scientists found evidence that it’s not an octopus at all. Newly published research ...

FILE -Field Museum and Chicago's skyline is seen from Soldier Field prior to an NFL preseason football game between the Chicago Bears and the Tennessee Titans, Aug ...