An American Alpine Club librarian shelves books mailed back from members across the United States. The club’s collection includes more than 21,000 books and 50,000 images of interest to climate researchers. (Joe Purtell, Special to The Colorado Sun)

50,000 old photos in Golden are helping scientists answer new questions about climate change

American Alpine Club library's archive of images by early mountaineers holds clues for researchers documenting the retreat of glaciers worldwide

Outdoors Primary category in which blog post is published
SunLit Interviews Primary category in which blog post is published

How a discarded title for her previous book became a Colorado author’s inspiration for the next one

"Burning Ridge" didn't quite fit the last K-9 mystery Margaret Mizushima wrote. But it set her on a course for a new type of crime novel.

Energy Primary category in which blog post is published

Tri-State, under pressure from its member co-ops to change or fall behind, is shifting to renewable energy

Giant power provider on the verge of deal with departing utility says it will shutter coal-fired plant in Nucla two years early as it retools carbon-emissions goals.