Jerri Nielsen was a forty-six-year-old doctor working in Ohio when she made the decision to take a year's sabbatical at Amundsen-Scott South Pole Station on Antarctica, the most remote and perilous place on Earth. The "Polies," as they are known, live in almost total darkness for six months of the year, in winter temperatures as low as 100 degrees below zero--with no way in or out before the spring. During the long winter of 1999, Dr. Nielsen, solely responsible for the mental and physical fitness of a team of researchers, construction workers, and support staff, discovered a lump in her breast. Consulting via email with doctors in the United States, she performed a biopsy on herself, and in July began chemotherapy treatments to ensure her survival until condition permitted her rescue in October.
