In 2015, chemists from Cambridge University, led by John Sutherland, who is a co-author on the current study, discovered a way to synthesize the precursors to RNA using
just hydrogen cyanide, hydrogen sulfide, and ultraviolet light — all ingredients that are thought to have been available on early Earth, before the appearance of the first life forms.
If they are clouds, they're probably made of ethane, acetylene or
hydrogen cyanide, based on what researchers have learned about Pluto's atmosphere — though they might not be clouds,
just reflective splotches on