The Case for Going to Venus
David Grinspoon looked as if someone had died. It was January 2017, and the astrobiologist had just received bad news. NASA had recently announced the results of its Discovery Program competition, which would decide where the agency would send its next outer space probe. The options: two asteroid missions or two individual Venus orbiters (another option involved an infrared space telescope). Grinspoon had been investigating Venus for most of his 30-year career. But NASA, to his chagrin, had gone with the asteroids.