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.

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.

New analyses of fossilized jaws reveal that massive, kraken-like octopuses once hunted alongside other marine predators.

For 25 years, a hand-sized fossil in Illinois rock was called the world’s oldest octopus. Scientists reexamined Pohlsepia mazonensis with a synchrotron that shoots powerful light beams through stone, ...

The “world’s oldest octopus” was actually a 300-million-year-old fossil impostor hiding its secret in tiny teeth.

For a quarter century, a hand-sized fossil pulled from the rocks of northern Illinois held one of the coolest titles in paleontology: the world’s oldest octopus. Guinness World Records listed it.

For nearly 25 years, a hand-sized fossil pulled from the rocks of Illinois held a remarkable title: the oldest known octopus on Earth. Guinness World Records listed it. Researchers cited it. It ...

A fossil once hailed as the world’s oldest octopus has been reidentified as a nautilus relative, overturning decades of scientific belief. British researchers used advanced synchrotron imaging to ...

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 ...