Pluto has an underground ocean

[Waspie_Dwarf]

Pluto has an underground ocean kept warm by a layer of gassy ice

Quote

We think that Pluto is hiding a liquid ocean, but why it hasn’t frozen is a big mystery. Now it seems that gas trapped inside the bottom layer of its icy outer shell may be keeping it warm.

A number of observations point towards an underground ocean on Pluto, including deep cracks on its surface that seem to come from subsurface water freezing and expanding. But unlike other subsurface ocean worlds in our solar system, such as the icy moons Europa and Enceladus, Pluto is not stretched and warmed by the gravitational pull of a larger nearby object, meaning its ocean should be frozen.

  Read More: New Scientist

 

[XenoFish]

I've got a question. Probably way off topic. But what would happen if Pluto switched places with say Mars? 

[Piney]

47 minutes ago, XenoFish said:

I've got a question. Probably way off topic. But what would happen if Pluto switched places with say Mars? 

It would be a water-methane world. It's basically a big comet.