Pluto's Darkest Secrets

New discoveries reveal just how strange Pluto and similar dwarf planets are, and using the latest science from cutting-edge NASA missions, experts are steps closer to understanding this mysterious alien world. This is a mashup of "How the Universe Works" S06E08 "Strange Lives of Dwarf Planets" and S05E03 "Secret History of Pluto", plus another Science Channel show "Space's Deepest Secrets" S04E10 "Pluto's Strange Secrets".