[Forward the Light Brigade]

The stories of Atlantis may well be true. How advance were they? Were they equal to our civilization?

[Max in Utah]

Here's some hard (very hard) evidence of amazing ancient machining:

The Tiny Ancient Artifacts Changing History! Ancient Egyptian Hard Stone Vases

I was a machinist for over 20 years and then did tool and fixture design for nearly 30 years following that, so I have some background to go by.

These Egyptian stone vases are remarkable for their precision of form in such hard and difficult materials. We could make such objects today but it would be an expensive and lengthy struggle to do so. Bottom line IMO is that the creators of these artifacts must have used precision machine tools to produce them, probably using diamond-tipped cutting tools.