A chemical reaction in ancient Roman concrete makes it stronger over time (2017)
> <i>We may think we're at the height of human knowledge, but the ancients did possess precious knowledge that has been lost to time.</i><p>I would love to hear why a chemical analysis doesn't solve the riddle here. Scientists were able to isolate a strain of the coronavirus and publish the entire genetic sequence in a matter of days, but we can't analyze a sample of concrete?