The octopus has three hearts, which help it survive in deep waters. Two pump blood to the gills, while the third circulates ...

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 ...

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.

There are many remarkable things about octopuses—they’re famously intelligent, they have three hearts, their eyeballs work like prisms, they can change color at will, and they can “see ...

Octopuses are like aliens on Earth: three hearts, blue blood, and the ability to squeeze through a space the size of their eyeball; they can use tools, transform their bodies to mimic other ...