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The abacus
The use of the abacus, with accounts in contiguous rows, was first documented in the Han Dynasty in China. -
Sep 15, 1190
The compass
Forced to rely on natural landmarks like mountains or islands, as well as rough maps, the first sailors felt almost always lost. -
Batteries
We must thank the frog for the batteries. In 1780, the Italian physicist Luigi Galvani discovered that the dead leg of a frog contracted when being touched with two pieces of metal. -
The bike
The bicycle is a two-wheeled vehicle, which are usually the same size and arranged in line. Suitable for transport. Thanks to the force exerted on the pedals, it is transmitted to the pinion of the rear wheel through a chain of flat links and thus the movement occurs. -
The photographic camera
William Talbot, the inventor of one of the first chambers (Joseph Nicéphore Niépce had produced the first known photograph on a pewter plate), was inspired by his inability to draw. -
The sewing machine
Humans used bones and horns to sew for tens of thousands of years, but the first patent for a machine that could do it without the need for annoying tools like needles and pins was requested in 1790. -
The light bulb
The bulb was so novel in the late nineteenth century that hotels had to put up a sign with the warning: "This room is equipped with electric light from Edison. Do not try to light it with a match. -
The wind turbines
Although the idea of windmills towards Europe was quickly taken from Egypt, it was not until the 7th century AD when the first windmills appeared that the technology of the windmills evolved to this day. -
The pen
If the Hungarian journalist Laszlo José Biró had not sold the first pen, his fortune (he died in 1985) would have been billions. -
The microwave
The first victim of microwaves was a peanut bar. It was in the pocket of the American engineer Dr. Percy Spencer, who worked in a certain range of waves emitted by a magnetron, an essential component in radars.