On the morning of May 8, 1965, physicist Carl R. Disch departed the radio noise building of Antarctica’s Byrd Station to return to the main complex 7,000 feet away. He would be walking through a snowstorm with winds of 35 mph, but a hand-line had been installed connecting the two installations so that scientists wouldn’t lose their way.

When Disch didn’t arrive at the main station in a reasonable time, a search party was organized. This spotted his trail but had to return to the station to refuel, and by the time they returned the trail had been covered by drifting snow. The area was searched extensively and the station lighted to increase its visibility, but Disch was never found.

During the search, temperatures dropped to -79 degrees Fahrenheit. The search was called off on May 14. Disch is presumed dead, but his body has never been found.