The hectocotylus is both a reproductive and sensory organ, Harvard scientists and others have found. Octopuses are some of ...

Scientists have learned how male octopuses' specialized sperm-depositing arm knows where to go ...

When the scientists paired two male octopuses in the same setup, the males interacted by touching arms, but they never ...

How do octopuses mate in the dark? A new study shows how the hectocotylus arm uses progesterone receptors to "taste" for a mate.

While it seems like researchers are finding new fossils all the time, it is actually quite rare for an animal to become fossilized. The vast majority of all animals that ever lived do not become ...