SECRET HISTORY
Paris in 1900, At the world industrial exhibition in Paris in 1900, a "street of the future" was assembled.
It was a moving electric sidewalk 3.5 km long,
moving through the entire exhibition.
Just 100 years ago a concept that we now only see in fantasy films
was successfully realized and used daily with a maximum of 70,000
people.
Nowadays, such a mechanism would cost a pretty penny - electricity has become somewhat more expensive, not ether, after all.
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