I didn’t know what to expect, but I love libraries, so I clicked the link. Those who are not interested in reading about a traditional library might also like this article, as it’s not about a traditional library. The subhead is “At the University of Copenhagen, researchers store ice cores that hold the keys to Earth’s climate past and future.”

It starts with:

In a narrow aisle of shelves packed with cardboard boxes, Jørgen Peder Steffensen grins like a mischievous child unwrapping a holiday present as he pulls out a plastic-wrapped hunk of ice from a box marked Keep Frozen.

The bag of ice contains the transition from 1 BCE to 1 CE, he says. “That means we have the real Christmas snow.”