Hidden underground ocean discovered on Pluto
Scientists have confirmed that Pluto harbours a hidden ocean beneath its central plain. Pluto's ocean, likely to be 'slushy' with ice, lies 150 to 200 km beneath the dwarf planet's icy surface, is about 100 km deep and contains as much water as all of Earth's seas. The discovery was made by analysing data collected by NASA's New Horizons mission.