For life, not for an afterlife

MARS has been much possessed by death. In the late 19th century Percival Lowell, an American astronomer, persuaded much of the public that the red planet was dying of desertification. H.G. Wells, in “The War of the Worlds”, imagined Martian invaders bringing death to Earth; in “The Martian Chronicles” Ray Bradbury pictured humans living among Martian ghosts seeing Earth destroyed in a nuclear spasm. Science was not much cheerier than science fiction: space probes revealed that having once been warmer and wetter, Mars is now cold, cratered and all-but-airless.Perhaps that is why the dream of taking new life to Mars is such a stirring one. Elon Musk, an entrepreneur, has built a rocket company, SpaceX, from scratch in order to make this dream come true. On September 27th he outlined new plans for rockets that dwarf the Apollo programme’s Saturn V, and for spaceships with room for around 100 passengers that can be refuelled both in orbit and on Mars. Such infrastructure, he says, would eventually allow thousands of settlers to get there for $200,000 each—roughly the median cost of an American house. To deliver such marvels in a decade or so is an order tall enough to reach halfway to orbit itself (see ). But as a vision, its ambition enthralls.