Earthworms are Hermaphrodites
Earthworms each has both male and female sex organs, yet they are incapable of self-fertilization. Earthworms spend most of their life underground, where they build intricate burrow networks. They contribute significantly to soil fertility and so play a vital role in gardens and farmland.
In 1931, a scientist decided to undertake an experiment in which he raised a monkey as if it were a person.