Posted: Jul 05, 2017 12:03 pm
by DavidMcC
Macdoc wrote:Still have some tricks we are unravelling

Ancient Romans made the world’s ‘most durable’ concrete. Here’s how it could hold back rising seas
Scientists on Monday said they have solved the mystery of how Roman concrete can withstand the sea for 2,000 years and counting, a feat impossible using modern mixes.

AFAIK, they also invented glass, which impresses me just as much as concrete does.