Sewage system

Sewage system

2500 BCE

The creation of the first sewerage system surely has to be one of the most fundamental life-bettering inventions of all time. Starting as simple, below-floor-level cesspits before evolving into brick-lined drains and, in more recent times, full-blown underground networks of tunnels and recycling centres, sewage systems have been an intrinsic part of civilisation since circa 2500 BCE. Excavated homes from the Indus Valley in Pakistan are some of the earliest to reveal the remains of connections to a large sewage drain.