And after more digging, they also found evidence for the chromosome in the nautilus, a mollusk that split apart from the octopus approximately 480 million years ago. The fact that these species ...

Their findings, published Monday in the journal Current Biology, indicate that octopus has one of the oldest known animal sex chromosomes, one that has likely been around since before the creatures ...

After 15 years of relentless searching and more than 1,000 expeditions, NOAA researchers have achieved an unprecedented feat: spotting a living nautilus in its natural habitat. This discovery is ...