There are things that have practically not changed since the invention, and the rulers are mostly to blame. There are inventions that were specifically destroyed by the government, why this is not entirely clear.
Think for yourself, what has the world come up with over the past 70 years?
And at one time there were people who came up with fundamentally new inventions, did not improve the ones, but made from scratch, this is a very big difference, but their inventions were ignored and forgotten, even trying to hide information about their existence.
Starlight
An unusual name has a super durable material that was created by an American. Starlight was created by self-taught Maurice Ward from Yorkshire. The material was first shown in the 90s on the TV show "Tomorrows World".
Two chicken eggs were taken, one covered with Starlight and the other not, after which the eggs were heated. The uncoated egg melted immediately, and the coated egg didn't even heat up. This is because the temperature that the material can withstand is 10,000 degrees. In 2011, the secret died along with its inventor.
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Gasoline generator
In 2012, Russian scientists created a gasoline generator that can turn almost any material into gasoline, but for some reason the government did not like the idea and it was decided to close the project.
Very thin power transmission wire
Again, Russian scientists made a wire that is 8 microns thick with the ability to transmit a current of 25 kilowatts. Many will say that the invention violates the laws of physics, indeed it is, Ohm's laws do not work. Again, everything was classified and the project was closed.
Star panel
This device performs the same functions as a solar panel, but is much more powerful. This device is also called "star" batteries. The device collects rays of light and turns them into energy, but compared to conventional solar panels, the "Star" panel has a capacity of 10 amperes per hour. The invention was presented in 2003, but again everything was curtailed and classified.
Car on water
This car, developed in Japan, was also lost from sight, for no apparent reason the company went bankrupt and ceased to exist.