Ice from the Canadian Arctic has completely melted, leaving puddles of water in its place and scientists devastated.

O.K., this is what actually happened: Ice cores, millennia-old ice samples extracted by scientists from locations across the Canadian Arctic, melted because of a freezer malfunction in a lab at the University of Alberta in Edmonton. The loss of these ice cores could hinder scientific research into how changes in the atmosphere have shaped Earth’s climate history, and how they could affect its future.

On April 2, the temperature of a storage freezer in the Canadian Ice Core Archive rose to about 100 degrees — some part of the cooling system failed, “then tried to get itself back into action and in the process, piped hot air back into the room,” according to Martin Sharp, the director of the archive. The freezer became so hot that it tripped the fire alarm, Dr. Sharp said, and partially or fully melted 180 ice cores collected by government scientists since the mid-1970s from the snowy expanse of the Canadian Arctic.

Dr. Sharp, also a glaciology professor at the university, said there was water all over the floor, and steam rising from puddles of ancient water.