Perhaps it is related to dark matter accumulation from the Kuiper belt.
If dark matter is a dense from of hydrogen, then we could say LERN is involved. From: Axil Axil http://www.sciencemag.org/news/2015/07/pluto-alive-where-heat-coming Pluto is alive—but where is the heat coming from? LENR http://www.space.com/29968-pluto-charon-photos-active-icy-worlds.html New Photos of Pluto and Moon Surprise, Puzzle Scientists
