There are a few ancient techniques that got lost along the way as we moved to differing mathematics and languages but there is nothing significant high technolo

There are a few ancient techniques that got lost along the way as we moved to differing mathematics and languages but there is nothing significant high technology found so far.It is a bunch of trenches, hardly high technology. If you talk to a doctor about diagnosis 100 years ago they would tell you about touch and listening to the body in various ways to do a diagnosis that a modern Doctor doesn't know because they just order an Xray. Listening to the heart is a bit old fashioned already as cardiograms have become part of the kit in your average ambulance. So the techniques will be lost in time.