FWIS3

Holy shit: https://www.bbc.com/news/articles/czxl849j77ko

The evidence is from seismic studies, and points to liquid water (and probably a lot of it) 6-12 miles under the surface.

I heard about this, very cool!

Worth noting though, we knew there was liquid water closer to the surface for some time now, in the ice caps. Basically within the ice you can have high enough pressure for liquid water- trouble on the surface is it just sublimates.