space-poop
Explanation
The Joke
Two people are stargazing when one shares the fact that "the first men on the moon pooped there." The other hadn't thought about it but acknowledges it makes sense -- "it would be weird if they held it on the surface since the excess mass" would matter. The first person notes it has been sitting there ever since, slowly drying out. They then reveal that it is the 50th anniversary of Apollo 11, and that Neil Armstrong's feces "have orbited the Earth about 650 times" (this appears to be a confused joke -- the poop was left on the Moon's surface, not in orbit, but the Moon itself orbits Earth).
The conversation then takes a philosophical turn. Given the enormous expense of going to the Moon, the questionable economic returns, and all the earthly problems that money could have addressed, "there is the lingering possibility that the grandest thing we have ever done was take a huge crap somewhere new." The final panels show the two people sitting in contemplative silence under the stars, with one noting "that's the saddest and most humanity-defining sentence I've ever heard." The other replies that "there's a lot to unpack in that assessment."
The Humor
The comedy works by systematically deflating the grandeur of the Apollo Moon landing -- arguably humanity's greatest achievement -- to its most base biological reality. The escalation is perfectly constructed: it starts with an amusing trivia fact (astronauts pooped on the Moon), builds through increasingly uncomfortable calculations about the poop's journey, and arrives at a genuinely melancholic philosophical conclusion that reframes the entire space program as an extraordinarily expensive bathroom break. The final exchange is the sharpest line: calling this "the most humanity-defining sentence" is simultaneously an insult to and a celebration of the human species, and the other character's observation that there is "a lot to unpack" acknowledges the layered absurdity without resolving it.
References
Apollo 11 astronauts Neil Armstrong and Buzz Aldrin did indeed leave bags of human waste on the lunar surface in July 1969. Multiple Apollo missions left waste bags behind, as discarding them reduced the weight the lunar module needed to lift off the Moon's surface. The fate of this biological material -- whether any microorganisms survived -- is actually of genuine scientific interest to astrobiologists.