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Laika(from the Russian: Лайка, a breed of dog, literally meaning "Barker" or "Howler")
On November 3, 1957, the U.S.S.R. stunned the world with a space sensation -- the launch of Sputnik 2 with a live dog on-board. But many details of what happened to the mission have only recently been revealed.

The Space Age had started less than a month before, with the launch of the first Soviet satellite on October 4, 1957. Sputnik 1, a 40-pound sphere, carried a simple transmitter and was considered very heavy compared to the U.S. spacecraft under development at the time.

Enter Sputnik 2. The Soviet press boasted about the 250-pound object equipped with a cabin, providing all the necessary life support for a dog named Laika. Well, almost. The Soviets admitted soon after the launch that the spacecraft would not return, meaning that the animal was doomed from the start. Years after Sputnik 2 burned up in the atmosphere, conflicting scenarios of Laika's death were circulating in the West.

was a Soviet space dog who became the first living mammal to orbit the Earth and the first orbital casualty.(c. 1954–November 3, 1957) Little was known about the impact of space flight on living things at the time Laika's mission was launched. Some scientists believed humans would be unable to survive the launch or the conditions of outer space, so space engineers viewed flights by non-human animals as a necessary precursor to human missions.[1] The United States used chimpanzees; the Soviet program elected to use dogs. Laika, a stray, originally named Kudryavka (Russian: кудрявка Little Curly-Haired One), underwent training with two other dogs, and was eventually chosen as the occupant of the Soviet spacecraft Sputnik 2 that was launched into outer space on November 3, 1957.

Laika died a few hours after launch, presumably from stress and overheating, probably due to a malfunction in the thermal control system. The true cause and time of her death was not made public until 2002; instead, it was widely reported that she lived for several days. However, the experiment proved that a living passenger could survive being launched into orbit and endure weightlessness. It paved the way for human spaceflight and provided scientists with some of the first data on how living organisms react to spaceflight environments. On April 11, 2008, Russian officials unveiled a monument to Laika. A small monument in her honour was built near the military research facility in Moscow which prepared Laika's flight to space. It features a dog standing on top of a rocket.