00:00What if you brought plumbing to ancient India?
00:02Day 1. You arrive in a dense river city.
00:04Open drains run beside tightly packed homes.
00:07Wells stand only steps away from waste channels.
00:09Everything floods back into the streets.
00:11They call it perfect. You call it disease.
00:14Day 2. You stand before the ruler and speak of contamination.
00:17Unseen organisms carried through water.
00:19He doesn't understand microbes.
00:21But he understands fever. He understands flooding.
00:23He gives you workers.
00:24You begin mapping sealed underground sewer tunnels beneath the city.
00:28Day 3. You build public showers.
00:30Free for anyone to use.
00:31But they don't use them.
00:33Rain crashes down.
00:34This time, the drains hold.
00:36Floodwaters move out instead of in.
00:38A raised reservoir rises outside the walls.
00:40Clay pipes carry clean flow into the palace.
00:43No buckets are needed.
00:44For the first time, water moves through the city by design.
00:47Day 5. Public latrines connect to the sealed sewer lines.
00:51Waste disappears underground.
00:53Streets begin to dry.
00:54Flies thin out.
00:55Fevers drop.
00:56Markets grow louder.
00:57The city smells different.
00:58Day 7.
00:59They call you pipe man.
01:00You officially control India's underground.
01:02You didn't build armies.
01:03You built sanitation.
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