on Drop your most "wtf that's not how the world works" from movies/tv shows. · c/memes · 7 pts · 1yhttps://www.youtube.com/watch?v=EMBkWtDAPBY&t=1
on Pre-Columbian Aqueduct around Cumbemayo, Peru · c/historyruins · 17 pts · 1yI think it is to reduce the speed at which the it flows.
https://www.youtube.com/watch?v=EMBkWtDAPBY&t=1
I think it is to reduce the speed at which the it flows.