Astronaut Eugene A. Cernan checks out the Lunar Rover. (NASA/file)
On this day in history, April 16, 1972, the Apollo 16 blasted off from Cape Kennedy, Florida.
Astronauts John Young and Charles Duke spent a record-breaking 71 hours on the moon. The astronauts spent 20 minutes outside of their spacecraft during which time they walked, they took pictures and drove an electric car over the lunar terrain. Command module pilot Thomas Kenneth Mattingly remained in orbit while his colleagues collected more than 200 pounds of rock and soil from the moon.
Apollo 16's mission ended April 27 with crew, craft and cargo all splashing down safely in the Pacific.