The mission marked a shift toward extended scientific exploration, with astronauts driving the battery-powered Lunar Roving Vehicle across craters and mountain bases to collect samples. Among their finds was the 'Genesis Rock,' a sample of ancient lunar crust believed to date back over four billion years.
Apollo 15 represented NASA's pivot from simple flag-and-footprints missions to serious scientific exploration of the Moon. David Scott and James Irwin touched down near the Apennine mountain range and Hadley Rille, a location chosen specifically for its geological richness rather than ease of landing.
For the first time, astronauts had wheels. The Lunar Roving Vehicle, a foldable electric buggy, let Scott and Irwin travel over seventeen miles from their lander across three separate excursions, dramatically expanding the range of terrain they could sample compared to earlier missions where astronauts walked everywhere on foot.
Among their haul was a strikingly pale, crystalline rock later nicknamed the 'Genesis Rock,' initially believed to be a remnant of the Moon's original crust dating back over four billion years, nearly to the Moon's formation itself. Though later analysis revised its age slightly downward, it remains one of the most celebrated lunar samples ever returned, a tangible piece of the solar system's early, violent history brought back for study in laboratories on Earth.