sleep experiment

in the late 1940s, russian researchers went in a dark experiment, they went 5 prisoners in a gas chamber they told the prisoners "if you guys stay awake you'll be free" the prisoners accepted , the researchers locked the door and on a strange gas, people were talking about something they became paranoid whispered, when in 5th day they screamed until they lost their voice, they drew markings on walls , tearing pages books, the researchers opened the door the prisoners eat themselves