I’ve heard about … alien structure discovered on the ground in the 30’s. As far as it goes the government of Canada classified it, but I have no idea where it is.
After the polar ice has been melted the atmosphere begins to grow thicker. Finally, a kind of critical mass is reached. And at this point, the atmosphere begins to work for us. Change the atmosphere into one suitable to colonization to construct farms and cities and build an infrastructure capable of supporting thousands of colonists.
