In 1942 and 1943, atrocities occurred at Dachau, a camp where prisoners were held. A doctor named Sigmund Rascher had cruel experiments conducted there.
The Nazi leaders had a problem: their pilots fell into cold water, and soldiers froze in winter. They wanted to know how much cold a person could survive and if someone could be saved after freezing.
So they used prisoners. They did not treat them as people, but as objects.
Some of them were submerged in ice-cold water for several hours, and some were just made to stay outdoors with no clothes on in a cold environment. Many of them died due to heart failure.
If they were still alive, the doctor tried to warm them up. He used very hot baths that hurt their hearts. He tried putting them next to other people for body heat. He even put hot water into their stomachs with tubes. This was not real science. It was very cruel.
Afterwards, it was these crimes which came into light in front of the world. The results of such tests were unhelpful since they were performed poorly.
For this, new rules were made. Now doctors have to take permission before doing any experiment.
It was from Dachau that an important lesson was learned by the world: People must never be treated as tools.

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