[Answer] 3. Which Russian dog was the first animal to orbit the earth aboard the Sputnik 2 in 1957?

Step 1 : Introduction to the question "3. Which Russian dog was the first animal to orbit the earth aboard the Sputnik 2 in 1957?"

...1. Laika 2. Mushka 3. Albina 4. Oleg Laika (Russian for 'Barker') was one of several strays that were trained for flight in the Sputnik 2; she was believed to be about 3 years old. Albina and Mushka were the two other dogs that were trained with her while Oleg Gazenko was the scientist that choose her for the flight. Although both the USA and USSR had sent animals on suborbital flights, neither had developed the technology to de-orbit so there was no expectation of her survival thus she also became the first animal to die in orbit. Sputnik 2 was launched on the 3rd of November 1957. Although it was claimed that she was euthanized before running out of oxygen on day 6 it is now known that she probably died within a few hours of the launch.

Step 2 : Answer to the question "3. Which Russian dog was the first animal to orbit the earth aboard the Sputnik 2 in 1957?"

Laika:

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