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Humans (short for Homo Sapiens in biology) are the main inhabitants of Earth.

Hybrid HumansEdit

Some humans that look normal may be part alien. According to Kevin, people with alien ancestry is actually pretty common on Earth. They are especially common among the offspring of Plumbers.

Known species that humans can reproduce with are Osmosians, Anodites, Pierce's species, Tetramands, Kinecelerans and Pyronites. In some cases, interbreeding technology is needed for it to work.