The space monkeys of legend are a band of ruthless marauders from a parallel dimension. Much of their origin is still shrouded in mystery. It is known that they are the result of a misguided series of experiments, however, the scientists responsible for their first appearances have all been terminated at the hands of their creation.
The monkeys taste for carnage is insatiable. At their beginnings, their numbers were small, but as they plundered and conquered new lands on their home world their forces grew. There are few that have survived an encounter with this menace. Those that have lived tell horrific tales of chaos and destruction. It was not long before the monkeys gained the means to travel among the cosmos and then between dimensions.
The space monkeys are different from average monkeys in a few ways. Their skin and fur are green. They can come in different shades, but they are invariably green. Engineered with hyper-intelligence, they are adept problem solvers and stand just behind man in their inventiveness. Also, they are generally larger than their Earth counterparts.
Once they set their sites on a planet there is generally no stopping them. Earth is a precious jewel, and coveted by the space monkeys, among others. For the time being, the wombats as well as some other galactic forces stand at our door to protect the planet against interstellar invasion. It can only be a matter of time though, until something breaks through. Whether that be the space monkeys or an unidentified other remains to be seen.