This was an Apocalyptic movie that had to do with either an Atomic Bomb Blast or an Airborne Bacteria that spread all over the world. The only way for survival for the people remaining, was for them to trek to Antarctica. A submarine sent up probes that took a body count of no living beings. If I'm not mistaken, Doug McClure was in the movie, and his friend walked from New York all the way to Antarctica. At the end of the movie, since these were the only living beings left on earth, they had to pairup "Men and Women" in order to start a new civilization.