On the space dog

From an article in the New Yorker reminiscing about Laika:

But the story of Laika had a dark lie at its core. In 2002, forty-five years after the fact, Russian scientists revealed that she had died, probably in agony, after only a few hours in orbit. In the rush to put another satellite into space, the Soviet engineers had not had time to test Sputnik 2’s cooling system properly; the capsule had overheated. It remained in orbit for five months with Laika inside, then plunged into the atmosphere and burned up over the Caribbean, a space coffin turned shooting star. Turkina quotes one of the scientists assigned to Laika’s program: “The more time passes, the more I’m sorry about it. We shouldn’t have done it. We did not learn enough from the mission to justify the death of the dog.”