A 53-year-old Australian cyclist survived four nights in the howling cold of the Alaskan wilderness after getting lost and falling into a stream. Yair Kellner built snow caves to block the chilling wind and hunkered down in his sleeping bag once he dried himself off and warmed up after crashing through the ice. Rescuers on snowmobiles carried Kellner to safety Saturday after he was spotted by a pilot. "I didn't feel psychologically broken down, I knew what I was doing was the best I could be doing," he told the Anchorage Daily News. Kellner was last seen by another competitor in the 350-mile Iditarod Trail Invitational from Knik to McGrath at the Finger Lake checkpoint about 130 miles in.