Blind Folk

The Blind Folk were a posthuman species created by the Qu from a colony of the Star People. Their Star People ancestors hid underground when the Qu attacked, but they were found and remade into blind cave-dwellers.

The underground ecosystem created by the Qu contained giant, blind insects descended from vermin, giant birds and rats and fields of fungi. The predators include crocodile-like fish and giant predatory bats, and the ceilings of the giant caves were covered in bioluminescent fungi and animals.

The Blind Folk are the human race living in this lightless world, using loud screams, long fingers and whiskers for orientation. Their eyes, useless in a world of darkness, are entirely absent.

The Blind Folk and the rest of their ecosystem died out when changes in the arrangement of the continental plates destroyed the kilometre-high caves.