How do Alaska animals sleep in the summer?

Do other Alaska animals hustle and bustle as we do in the summer, building nests and storing seeds and hunting and pollinating throughout the night? I recently spoke with Cory Williams, an associate professor at Colorado State University, about the different ways Arctic animals respond to the summer sun. UV doesn’t penetrate the lens of the human eye, but some animals might be able to sense its summer rhythm. Fish and Wildlife ServiceArctic Alaska caribou likely have weak daily rhythms in the summer, Williams said, but their sleep is driven more by their digestion than the sun. The routines of summer — mealtimes, work, summer camps and, for some, Alaska Science Forum deadlines — keep us more or less in check, even with the midnight gardening.