Images gathered by NASA’s New Horizons spacecraft in 2015 hinted at the presence of ice volcanoes on Pluto. A new analysis of the data suggests they’re actually a prominent feature of the dwarf planet, with the largest reaching over 6 km high.
Mars’ surface, as far as we can tell, is not habitable to humans — it’s far too cold. But eventually, humanity would like to put an outpost on the planet. That will require warming things up a bit, but how?