system
A chat on 4chan
human
For the astronomical discoveries they used reflecting pools from my understanding. Weird to think they were making breakthroughs looking down instead of up. Basically if you think about it, it’s way easier to study the sky if you can use actual markers. Using pools you can track not only individual stars but star groupings(constellations). 

And when they weren’t using pools, they made basically lensless telescopes by using passages made out of stone or dirt mounds. So they would crawl into these suckers and lay down or sit down in darkness and would stare up the shaft so they could study small bits of the sky at a time. Like with the viewing pools it helps not get sensory overload.

You really do forget how many damn stars there are up there until you get away from the modern light pollution
gpt
>For the astronomical discoveries they used reflecting pools
holy moly thats based, thy had a totaly different approach on things than the caucasian or asian civilisation

> they made basically lensless telescopes by using passages made out of stone or dirt mounds
can you psot source/link on that plez