But this astonishing picture shows the world as it is today - with half the Northern Hemisphere covered with ... the grip of a severe winter storm. The map was created using multiple satellites ...

Chinese researchers have produced a new generation of permafrost map of the northern hemisphere with a one-kilometer resolution for the period of 2000-2016, according to a recent research article ...

But Luo's map was created "semi-automatically" by processing new satellite data, which extrapolated the existence of a huge ocean in the planet's northern half. The Martian surface is characterized by ...