January 20, 1974 – The Earth, seen forty years ago today from…

January 20, 1974 – The Earth, seen forty years ago today from the Skylab space station with a view to the ice in Canada’s Hudson Bay: “The buildup of ice along the windward shore (very white) followed by the clear water gap (dark) caused by the wind blowing the newly formed ice toward the opposite shore, and finally the patterns in the ice structure itself are studied to learn more of the nature of the winterization of this area.” (NASA)