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 ...

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

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

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

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 ...

Octopuses are fascinating in more ways than one. Beyond their impressive intelligence, they also have other unique features like three hearts, an amazing ability to camouflage, and a central brain ...

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 ...