Pluto Heart Suggests Dwarf Planet Has Underground Liquid Water Ocean Pluto's heart-shaped region hints that a subsurface ocean exists on the dwarf planet. Simulations of an asteroid impact suggest this body of liquid water is at least 60 miles deep. by Rhodi Lee
Science NASA Is Mapping Pluto's 'Broken Heart' To Figure Out How The Dwarf Planet Came To Be by J.E. Reich
Science NASA Releases More Incredible Images Of Pluto Revealing Floating Icebergs And Its Icy Plains by Lauren Keating