Why didn't they save Laika?

Could you elaborate on the ethical considerations surrounding the decision not to save Laika, the dog sent into space by the Soviet Union in 1957? Was there a lack of technological capability or did the mission's scientific goals outweigh concerns for Laika's well-being? What were the implications of this decision for the future of animal testing in space exploration? And, did the public's response influence the Soviet government's stance on such matters? Surely, the question of "Why didn't they save Laika?" demands a thoughtful exploration of these complex ethical and historical factors.