The Lost Cosmonauts:

We all know that Yuri Gagarin was the first ever astronaut to travel into outer space. But what if he was the first ever astronaut to travel into space and survive? Historians believe that he was not the first cosmonaut to be sent into space. Allegedly, the Soviet Union sent at least two spacecrafts into outer space before the Vostok 1, but both were filed missions and no one was rescued life. The Government prevented this information from going public for obvious reasons, but after the fall of the USSR, some states revealed secrets documents indicating towards these missions, but enough amount rock solid proof can still not be found.