SurveyorNASA’s robotic explorer Surveyor 3 touches down safely on the moon, snapping pictures and – with an extendable scoop arm – gathering and analyzing samples of lunar soil. Its landing site, a lunar plain called the Ocean of Storms, becomes the site of a unique long-term experiment: in two years, Surveyor 3 will become the first (and, to date, only) unmanned spacecraft to be personally inspected by humans after its landing.