When the distant dwarf planet formed, it not only had plenty of ice, but also plenty of heat for an ocean of meltwater. This deep sea may still exist today.
On July 14, 2015, the New Horizons spacecraft sped past Pluto at ten times the speed of a bullet. It was the first and so far only time that the dwarf planet received a terrestrial visit and this exotic world was thus explored in detail. Since then, scientists have meticulously analyzed the measurement data from this encounter that were radioed back to Earth over many months. Recently they could even do some of Pluto's mysterious deep sea
