On November 3, 1957, the second artificial Earth satellite was launched. He carried the dog Laika into space; It was the first spacecraft in the world with a biological bone on board! Why was Laika chosen for this flight? Among the number of candidates selected, she was tested for her phlegmatic character, self-control and ability to remain motionless for a long time in special pressure cells and model cells. Laika is a girl, and according to the results of the study, it was easier for females to adapt to the design of the toilet in the cabin. And Laika also had a regular mix. They were believed to be more durable, unpretentious to food and conditions, and also have a hardened nervous system compared to domestic purebred dogs. To monitor Leica's vital signs, a radio telemetry system was installed on the satellite, which transmitted information to Earth at every stage of the flight. The data obtained allowed us to conclude that it is safe for humans to stay in space, and since 1959, under the leadership of the chief designer Sergey Pavlovich Korolev, they began to develop a spacecraft for human flight into space. This flight did not include the return of the satellite and the dog to Earth. But Leika's heroic flight demonstrated the possibility of a highly organized animal capable of surviving in conditions of weightlessness.

On November 3, 1957, the second artificial Earth satellite was launched. He carried the dog Laika into space; It was the first spacecraft in the world with a biological bone on board! Why was Laika chosen for this flight? Among the number of candidates selected, she was tested for her phlegmatic character, self-control and ability to remain motionless for a long time in special pressure cells and model cells. Laika is a girl, and according to the results of the study, it was easier for females to adapt to the design of the toilet in the cabin. And Laika also had a regular mix. They were believed to be more durable, unpretentious to food and conditions, and also have a hardened nervous system compared to domestic purebred dogs. To monitor Leica's vital signs, a radio telemetry system was installed on the satellite, which transmitted information to Earth at every stage of the flight. The data obtained allowed us to conclude that it is safe for humans to stay in space, and since 1959, under the leadership of the chief designer Sergey Pavlovich Korolev, they began to develop a spacecraft for human flight into space. This flight did not include the return of the satellite and the dog to Earth. But Leika's heroic flight demonstrated the possibility of a highly organized animal capable of surviving in conditions of weightlessness.