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A biosatellite is an artificial satellite designed to carry plants or animals in outer space. They are used to research the effects of space (cosmic radiation, weightlessness, etc.) on biological matter while in orbit around a celestial body. The first satellite carrying an animal (a dog, "Laika") was Soviet Sputnik 2 on November 3, 1957. On August 20, 1960 Soviet Sputnik 5 launched and recovered dogs from orbit Earth orbit.
The most famous biosatellites include: