Extremely rare historical photos you certainly don't know

Historical photos you should know to understand a period that is not far away but it is full of interesting and strange things.

The historical picture was more than 70 years ago when people used bears to cure back pain in Romania.

In the 50s of the last century, motorists had to take off their clothes and lie down like this to get the car past the world record speed.

The first class on sex education in the world in 1929.

Historical mark of two Harley brothers and the first large displacement car of the time.

The way people create famous logos of Metro-Goldwyn-Mayer.

Since there are no measuring devices, it is the only way to test helmets on the wall.

A pilot trying to reboot his plane in the air, even if he did not restart the engine, the plane could still land like a roller coaster without any problems.

American poet Hemingway reveled in a drink.

The main prototype of the American Gothic painting is worth tens of millions of dollars.

The way the workers saw the wood shaved off each other's face, the picture was taken in 1940.

An American soldier fed sheep during the historic war on Saipan with Japanese troops in 1944.