Wanted: Planet-Saving Cops.

• Position: SPACE

Ever wanted to save the Earth from aliens? NASA has a job for you. The space agency is hiring a "Planetary Protection Officer," and despite the Hollywood-sounding name, the job is serious. One of the main duties is to protect Earth from "organic-constituent and biological contamination"--in other words, prevent aliens from hitching a ride back to Earth. How will the Planetary Protection Officer do that? By ensuring astronauts follow NASA's strict protocols for space travel and avoid contamination. With a manned trip to Mars possible as soon as the 2030s, this job is critical. Although...