5 unique ancient inventions that were very ahead of their time

• Pigeon Dron on a steam thrust: in 428 BC. The Greek inventor, the architect, invented not only the theory of acoustics, but also a wooden dove that was conducting a steam flight. Despite the impressive idea, the invention remained impractical without using the camera.
• Automatic doors: in the 1st century AD Geron Alexandria engineer created automatic doors in the temple, which opened with the help of a pneumatic system and thermal pressure caused by the fire.
• Ancient water machine: Geron also invented a system for the sale of blessed water in the Roman temple. Visitors threw coins to open the water mechanism and get the sacred liquid, regulating the amount of water depending on the amount.
• Seismoscope: Ancient Chinese scientist Zhang Hen created a seismancope in 132, which reacted to earthquakes with a hammer and dragons, removing the ball and determining the direction of the catastrophe.

• Visa with a navigation system: In the Troescage era, Chinese inventor MA Jun created a visa with a built -in compass using a complex gear system to always point in one direction. Without a magnetic compass, the invention was innovative for its time.