The Chromosomal Code

A sudden inexplicable ice age has driven Earth's population into the tropics, except for a few die-hards eking out a tenuous existence scavenging the snow-covered ruins of civilization. One such straggler is John Starkman, making his home in the frozen wastes of western Pennsylvania. Already an outcast because of a certain physical peculiarity, he saw no reason to join his neighbors in fleeing south. Then one day a spaceship comes to collect him and the other stragglers, and Starkman discovers there have been other changes besides the ice age...