Video-Ten technologies that have been lost in time, based on historical data

Technologies that we could have today, but they have lost over the years ...
H technology of today, certainly is at the highest levels we've seen, but in ancient times, many cultures have developed their own technology to make it easier for everyday life, but over the years, many cultures and peoples were lost together and the secrets of their technology ...
In the video below you will see the ten technologies that we have lost today, based on historical data ...