Do not underestimate old knowledge simply because it was forgotten... "It’s a popular hubris that we live in an age of unprecedented technological innovation – that our ancestors lived in a time where there were fewer technological advances, blinded as they were by their primitive superstitions and lack of access to the resources we have today."
http://www.forbes.com/sites/alexknapp/2013/08/25/these-two-ancient-roman-techs-could-disrupt-modern-industry/ mic
