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Review of the history of science and technology in the world: black and white silent film restores t

Invention is also an art. The color of black-and-white silent films, combined with a little creativity, now it seems that these inventions are still so intriguing, coupled with the heavy sense of history, give a new color to the spirit of invention. Looking at these black and white histories, it's as if they are colored.

The machine will meow every ten minutes

When you see this invention, you can't guess what it is. When you know its real use, you can't help laughing. This inventor is really amazing. It is said that it was invented to scare away all kinds of mice and rats. Doraemon came out in 1969. Is it inspired by this machine? Just can the modeling go any further!

Another name is "waiting to die"

In the 1950s, tobacco was the face of cool!

Dog clip (1940)

It's probably for rich people who want to have dogs but don't want to touch them.

Magic wheel

It's made of synthetic rubber by Goodyear tire rubber company. It's full of light bulbs. Compared with it, the refitted wheel hub is weak and explosive.