Start the day smarter. Get all the news you need in your inbox each morning. Octopuses have three hearts. One heart pumps blood throughout the body and the other two move blood to the gills ...

Male blue-lined octopuses inject a powerful neurotoxin into the hearts of females before mating to avoid being eaten, ...

Scientists have discovered that when mating, male blue-lined octopuses will inject a powerful, incapacitating neurotoxin into ...

Octopuses have blue blood, three hearts and a doughnut-shaped brain. But these aren’t even the most unusual things about them! Known for their otherworldly look and remarkable intelligence, octopuses ...

Did you know octopuses are highly intelligent animals with the ability to problem-solve complex puzzles – and even change ...

Perhaps two of the most interesting discoveries about octopuses, though, is that they have three hearts and nine brains. There may be many types of octopus, but they all have a truncated anatomy.

Male blue-lined octopuses inject a powerful neurotoxin into the hearts of females before mating to avoid being eaten, according to a new study. The males have evolved to use a venom called ...