Complex sentence: The blast destroys the other ships, but the "Kalinka" escapes through the maggot hole, spiraling out of control and crashing into what appears to be ice age Earth.
Split into simpler sentences: The blast destroys the other ships and the "Kalinka" manages to escape through the maggot hole. However, the "Kalinka" spirals out of control and crashes into what appears to be ice age Earth.