Week in Insights: We Feel as Giants, Once Again

On July 31, 1971, Apollo 15 astronauts James B. Irwin and Commander David Scott first used the Lunar Roving Vehicle to explore the moon’s surface. The LRV was designed to operate in low gravity, making it easier for the astronauts to maneuver.

Apollo 15 was the fourth US space mission to land on the moon. The mission didn’t last long—it began on July 26 and ended on Aug. 7. The actual lunar surface exploration took just a few days, from July 30 to Aug. 2. And Scott and Irwin spent less than a day on the moon’s surface—just 18 ...