McMurdo Sound. Geologists examine rocks. Meteorologist release weather balloon. D-8 weasel tractor at work. Man feeds penguins

Aerial views from aircraft flying over McMurdo Sound in Antarctica. Convair 340 aircraft parked in blowing snow. Three men, in parkas, walk in blowing snow. A D-8 Weasel tractor backing up as men shovel snow in its path. Two geologists examine a piece of rock through a magnifying glass. A man looks through a microscope. A man in heavy parka and cold weather gear, walks on snow. Two meterolologists release and track a weather balloon. A man feeds penguins.