The moon has a distinctive smell. Ask any Apollo moonwalker about the odiferous nature of the lunar dirt and you'll get the same answer. The smell of the moon was noticed after the astronauts removed their space suits and could smell the remains of the lunar dirt on their shoes.

With NASA's six Apollo lunar landing missions between 1969 and the end of 1972, a total of 12 astronauts kicked up the powdery dirt of the moon, becoming an elite group later to be tagged as the "dusty dozen."

"All I can say is that everyone's instant impression of the smell was that of spent gunpowder, not that it was 'metallic' or 'acri"'. Spent gunpowder smell probably was much more implanted in our memories than other comparable odors," said Apollo 17's Harrison "Jack" Schmitt, a scientist-astronaut who walked the moon's surface in December of 1972.

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