💧Water Thread 🧵:
Civilization has always depended upon water for life. From Hunter-Gatherers and Nomads who followed rivers and migrated to pasture lands, to the first agriculturalists, water was a foundation of human life. But how did ancient people manipulate water? Ancient peoples were not dumb. They were simply faced with hard problems. But the ingenuity of their solutions given the constraints they faced showcases their adaptive and clever minds. For many of these people, necessity drove the inventive process. See below for some examples!

@AaronBergman18 Civil engineer here! There are some problems that emerge when we excavate deep underground, that increase costs significantly. I'll explain a couple of these in the thread below! @AaronBergman18 First of all, all soil is not created equal. In areas with shallow bedrock, digging out a large volume of space would be prohibitively expensive. In areas without bedrock, the walls have to be built very thick and deep to resist the pressure of the surrounding soil, see below.