위키백과 ― 우리 모두의 백과사전.
Sergey Korolev, July 1954
Sergey Korolev, founder of the Soviet space program, in July 1954 with a dog that just returned to Earth after a lob to an altitude of 100 kilometers on an R-1D scientific rocket. In 1951, the Soviet Union became the first country to safely recover a living organism after a flight in space. In 1957, a dog, Layka, became the first living organism to reach Earth's orbit.
From http://grin.hq.nasa.gov/ABSTRACTS/GPN-2002-000163.html
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