Earth is not well. The promise of starting life anew somewhere far, far away-no climate change, no war, no Twitter-beckons, and settling the stars finally seems within our grasp. Or is it? Critically acclaimed, bestselling authors Kelly and Zach Weinersmith set out to write the essential guide to a glorious future of space settlements, but after years of research, they aren´t so sure it´s a good idea. Space technologies and space business are progressing fast, but we lack the knowledge needed to have space kids, build space farms, and create space nations in a way that doesn´t spark conflict back home. In a world hurtling toward human expansion into space, A City on Mars investigates whether the dream of new worlds won´t create nightmares, both for settlers and the people they leave behind. In the process, the Weinersmiths answer every question about space you´ve ever wondered about, and many you´ve never considered: Can you make babies in space? Should corporations govern space settlements? What about space war? Are we headed for a housing crisis on the Moon´s Peaks of Eternal Light-and what happens if you´re left in the Craters of Eternal Darkness? Why do astronauts love taco sauce? Speaking of meals, what´s the legal status of space cannibalism? With deep expertise, a winning sense of humor, and art from the beloved creator of Saturday Morning Breakfast Cereal, the Weinersmiths investigate perhaps the biggest questions humanity will ever ask itself-whether and how to become multiplanetary. Get in, we´re going to Mars.