Humans are a bipedal, omnivorous, mammalian race of mostly hairless primates. The origin of this species is unknown as it shows every appearance of having multiple planets of origin and seems native to all three known major galaxies.
The Human race is not unique in not having a single known homeworld, and even going so far as to seemingly have evolved on multiple planets, but it is one of only a few dozen that can lay that claim on at least one world in all three major galaxies, and at least one minor one. Many theories exist, the most popular being that certain worlds were seeded with similar DNA chains by another, older race and this led to parallel evolution of the species. This is popular in it’s explanation of minor genetic discrepencies leading to certain quirks particular to the humans of different galaxies or planets. Notably handedness, which in Galfarra is nearly always left, but in the Milky Way, and Earth especially, right is the dominant hand. Also, the genetic chain for red hair is closely linked to the gene for skin pigment in the people of Lorithen in the Vorton Galaxy resulting in its dark skinned members being nearly all copper or orange haired. Another one is subtle differences in organ placement. Terran Humans being mirrored in a few respects, like the appendix, compared to all Galfarran Humans, and nearly completely when compared to the only other native humans of the Milky Way on the small moon of Plindreth near the galactic core.
As is often the case Humans can breed with varying degrees of dificulty and success with many other species of similar biology, anatomy, etc.