The Apollo 11 astronauts had to fill out a customs form for their lunar samples.

After spending eight days, three hours, 18 minutes, and 35 seconds in space — with 21 of those hours spent on the moon — Neil Armstrong, Buzz Aldrin, and Michael Collins splashed down 920 miles southwest of Hawaii. The three NASA astronauts had achieved the seemingly impossible on a mission that was the very definition of “otherworldly.” But once back on Earth, they were back in the clutches of human bureaucracy — because after they landed, the Apollo 11 heroes had to fill out a U.S. Customs form.