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channax 7 year s ago
Bonus 2 : OF COURSE, it's a MIRROR , Einstein ! ! !
       
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Automatic doors, 1st century AD

Automatic temple doors were already known in Ancient Greece. Back then, they were run by Hero’s aeolipile, the oldest prototype of the steam engine. A fire was built on the altar, under which pipes with water were concealed. The steam activated a system of blocks connected to the doors. This created an illusion of magic, which was only to the priests’ benefit.

 

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