Haboralite

Haboralites are a weird offshoot of humanity which evolved within a secluded valley, in a small pocket dimension. The exotic energies mixed with compound genetic abnormalities have resulted in incredible mutations to where they are no longer recognizable as human. The method as to how this population found itself in such a place remains a mystery.

Robbolins

Robbolins are subhuman degenerates, descended from a population which were stranded on an isolated Pacific  island. Strange radioactive deposits have mutated their DNA over thousands of years, leaving the resultant population far divergent from human.

Abbmoog

The Abbmoog are strange, two limbed creatures discovered on a far away planet with abnormally high gravity. They are have an intelligence level akin to dogs and cats, and are kept as pets by several different spacefaring species. Researchers were surprised to find the squat creatures share 99% of their DNA with modern human beings, leading to theories they are a distant evolutionary offshoot. How a population of humans could have been transplanted many light years away remains a mystery.