Romans plumbing was quite advanced. They knew vacuum. They had basic bacterial theory and would never take drinking water from polluted river. Nemi Ships had cold/hot water, piston pumps, water taps...

It is very sad we had to reinvent most of that.

I thought they had the miasma theory, not basic bacterial theory. This article implies that that was the case.

Thanks for pointing out the Nemi ships. I hadn't heard of them before.

We have to thank the downfall of the imperium to that.

I just heard on the radio this morning that the excavators for the expanded London Underground are finding incredible artifacts while digging the new tunnels. Fascinating stuff!

http://www.npr.org/2014/12/23/372623549/we-go-underground-to...

The article reports that they found skeletons and coins. Why is it hard to believe that human remains and coins were found under a city where millions of people have lived and died? I think these findings are highly credible.