supplementary-exist9 | 6 points | May 22 2022 09:29:14

费米粗略估计，在可观测的宇宙中存在一亿亿个智慧文明

https://i.redd.it/gnsqsnxsxz091.jpg

[-] ProfessionalBuyer517 | 1 points | May 22 2022 12:29:08

哟，怎么涨到一亿亿啦

[-] FantasticPear3799 | 1 points | May 24 2022 03:50:52

真会编段子