Pluto has giant underground ocean, say scientists studying New Horizon data Scientists have found evidence that tiny, distant Pluto harbours a hidden ocean beneath the frozen surface of its heart-shaped central plain containing as much water as all of Earth's seas. The finding, reported in two research papers published in the journal Nature, adds Pluto to a growing list of worlds in the solar system beyond Earth believed to have underground oceans, some of which potentially could be habitats for life. Pluto's ocean, which is likely slushy with ice, lies 150 to 200 kilometres beneath the dwarf planet's icy surface and is about 100 kilometres deep, said planetary scientist Francis Nimmo of the University of California. http://www.abc.net.au/news/2016-11-17/underground-ocean-found-on-pluto/8032460