01Octopuses have three hearts, but few friends.

One heart is for pumping blood to the body, and the other two are for the gills.

In spite of this surplus of hearts, octopuses are solitary creatures who don’t tend to make friends. They’re more likely to eat another octopus than invite them to dinner.

They also have more brains than we do, but that’s a story for later.

Source: Wikipedia External link