Nature

Octopuses have three hearts—two pump blood to the gills, one pumps it to the body. Their blood is blue because it uses copper-based hemocyanin instead of iron. Each of their 8 arms has its own mini-brain that can act independently—an arm can "decide" to open a jar while the central brain focuses on something else.

Forests have their own "Wood Wide Web"—a network of fungal threads connecting trees underground. Mother trees recognize their offspring and send them extra nutrients. Dying trees dump their resources into the network as a final gift to the forest.