4 Lost Technologies In Ancient History | Unveiled

Some secrets of the ancient civilisations have been lost! Join us... and find out more! Subscribe for more from Unveiled ► In the modern world, we’ve grown to expect the very best that technology has to offer. But, actually, we’ve lost some of our knowledge along the way! In this video, Unveiled takes a closer look at four LOST TECHNOLOGIES from ancient history, to try to discover where they disappeared to...