For 25 years, a hand-sized sea creature embedded in Illinois rock held the title of the world’s oldest octopus. Now, thanks ...

A 300-million-year-old fossil that earned a Guiness World Record in 2015 as the world’s oldest octopus, has now been reclassified after new research published in Proceedings of the Royal Society B.

Pohlsepia mazonensis fossil reclassified from octopus to nautiloid species Advanced scans revealed a radula with 11 tooth-like elements, typical of nautiloids Decomposition before burial made the ...

A 300-million-year-old tentacled sea creature has lost its crown as the world’s oldest octopus, after scientists found ...

More than two decades after scientists identified a fossil as the world’s oldest octopus — officials now say it wasn’t one at ...

A new study reveals that the world's oldest octopus fossil, previously classified as Pohlsepia mazonensis, is actually a nautilus relative, prompting Guinness World Records to amend its listing.

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

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 ...

LONDON — 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 ...