A famous 300-million-year-old fossil that was thought to be the world's oldest octopus—even featuring in the Guinness Book of Records—has turned out to be something else altogether. In what amounts to ...

More than two decades after scientists identified a fossil as the world’s oldest octopus — officials now say it wasn’t one at all. A recent study published in the journal Proceedings of the Royal ...

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 ...

Pohlsepia mazonensis, a visually underwhelming fossil from Illinois, fundamentally broke our understanding of cephalopod evolution. Described in 2000 and hailed as the oldest known octopus in the ...