Scientists found out that, despite it being so far from the Sun, Pluto's interior is still warm. It has been that way ever since Pluto formed. Under the haze-layered atmosphere of Pluto, there’s a frigid surface full of craters and impure water-ice. There’s also a large impact basin, flooded by frozen nitrogen. And below that icy crust could be an internal ocean. Learn more about your ad choices. Visit megaphone.fm/adchoices