Even with all the profound advantages the South Pole enjoys compared to Mars, even on a planet where living things have spent billions and billions of years figuring out how to adapt to and thrive within an incredibly diverse array of biomes—on a planet where giant tubeworms the size of NBA basket stanchions have colonized lightless ocean depths at which a human would be crushed like a grape under a piano—the South Pole simply cannot support complex life. It is too cold, and its relationship with sunlight too erratic, for living things to sustain themselves there. On astronomical scales it is for all practical purposes in the exact same spot as some of the most life-rich and biodiverse places in the known universe, and yet no species has established a permanent self-sustaining population there. Ever.

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Even with steady year-round subtropical sunlight, even with conditions infinitely more nurturing than those found anywhere on Mars, the summit of Mount Everest cannot support complex life. It's too cold; the air is too thin; there is no liquid water for plants and animals to drink. Standing on the top of Mount Everest, a person can literally look at places where plants and animals happily grow and live and reproduce, yet no species has established a permanent self-sustaining population on the upper slopes of Everest. Even microbes avoid it.

Life on earth writ large, the grand network of life, is a greater and more dynamic terraforming engine than any person could ever conceive. It has been operating ceaselessly for several billions of years. It has not yet terraformed the South Pole or the summit of Mount Everest. On what type of timeframe were you imagining that the shoebox of lichen you send to Mars was going to transform Frozen Airless Radioactive Desert Hell into a place where people could grow wheat?

The only good news about space colonies designed by Elon Musk and Jeff Bezos is that they aren’t going to happen. Musk will not be launching a million people to Mars in 15 years, not even close (although I do see some fantasy synergy between Musk and Trump’s plan to deport millions of people on day one of his presidency — maybe he’s dreaming of filling his Martian city with Puerto Ricans, Haitians, and South American gang-bangers). Bezos is not going to build an office park in Earth orbit, not as long as he can bulldoze farm land for cheap and assemble giant concrete boxes here on Earth. Those are two professional liars. Don’t believe anything they promise, because all they really promise is controlling you to their benefit.