Apalapucian

The Apalapucians were the inhabitants of Apalapucia.

Biology
The Apalapucians looked similar to humans. They had a binary vascular system, leaving them susceptible to Chen-7. There were other biological differences from humans; though anesthetics would work, other medicines could be fatal. (DW: The Girl Who Waited)

Culture
The Apalapucians were cultural scavengers, known for their habit of taking ideas from other species. The Two Streams facility was filled with alien artwork and even copies of entire locations. (DW: The Girl Who Waited)

Technology
The Apalapucians were able to create the Two Streams kindness facility. It used temporal technology to selectively slow down time, allowing patients to live out years in a day. Each patient was kept in a different time stream, meaning they could occupy the same space but never encounter each other. The Two Streams facility also had teleporters for transportation, an interface to help the patients and Handbots for aid. (DW: The Girl Who Waited)

History
The Apalapucians suffered an outbreak of the Chen-7 plague, which would kill in a day. They created the Two Streams facility so that the infected would be kept quarantined but could still have long lives. When the Doctor, Rory Williams and Amy Pond came to Apalapucia, they landed in the Two Streams facility and Amy was accidentally trapped there for thirty-six years, though they were able to reverse the timeline and save her before then. (DW: The Girl Who Waited)