That sadly was a case of extraterrestrial death. "In 1999, several Russian sources reported that Laika had died when the cabin overheated on the fourth orbit.

That sadly was a case of extraterrestrial death. "In 1999, several Russian sources reported that Laika had died when the cabin overheated on the fourth orbit. In October 2002, Dimitri Malashenkov, one of the scientists behind the Sputnik 2 mission, revealed that Laika had died by the fourth circuit of flight from overheating."