How We'll Live on Mars

This is a short but comprehensive overview of why we need to colonize Mars and the problems that must be solved in settling it. We would already be there, Petranek points out, if we had preserved and improved the technology that got us to the moon. In his view, NASA has accomplished little of value during the hiatus. But now private companies are making real progress toward turning humankind into a spacefaring species, which is essential both as insurance against disaster on Earth and because “when the first humans set foot on Mars, the moment will be more significant in… show more.