Hakai Magazine:  “At the University of Copenhagen, researchers store ice cores that hold the keys to Earth’s climate past and future…Copenhagen is one of several places in the world where pieces of ice cores drilled from our planet’s extremities are kept safely cold. Other large research freezers are located in the United States, Australia, France, Italy, Germany, Russia, and Japan. According to Steffensen, Copenhagen has the most samples from the world’s deepest cores, amounting to 15.5 kilometers of ice. That’s about the distance from Steffensen’s laboratory in central Copenhagen to this unassuming yellow-tiled warehouse in an industrial park, where the ice archive has been housed since 2019. Both the lab and the freezer spaces are temporary, awaiting the completion of a massive construction project for a new university facility. The archive also keeps an additional five kilometers of ice from shorter cores drilled in Greenland, Antarctica, Iceland, Patagonia, and a glacier in a Slovakian cave. Some ice samples came from initiatives with strong Danish involvement, while others came from researchers abroad looking for a chilled home…”