Using nuts-and-bolts engineering and a unique grasp of human history, takes us to the not-very-distant future, when our global society will branch out into the universe. From the current-day prospect of lunar bases and Mars settlements to the outer reaches of other galaxies, Zubrin delivers the most important and forward-looking work on space and the true possibilities of human exploration since Carl Sagan's Cosmos. Sagan himself said of Zubrin's humans-to-Mars plan, " really, nearly alone, changed our thinking on this issue." With , he takes us further, into the prospect of human expansion to the outer planets of our own solar system—and beyond.