>"In his latest book, Spacefarers: How Humans Will Settle the Moon, Mars, and Beyond, Christopher Wanjek examines humanity’s obsession with space travel, why our dreams of living among the stars haven’t yet come to fruition and what it will take to finally get our interstellar efforts off the ground. Excerpted from SPACEFARERS: HOW HUMANS WILL SETTLE THE MOON, MARS, AND BEYOND by Christopher Wanjek, published by Harvard University Press. As hostile an environment as Antarctica is, the icy continent still has one thing that the Moon and Mars doesn’t, and that’s air."