Environment









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Shining a Light on Light Pollution

The David Dunlap Observatory (cc) Marko Kudjerski It’s hard to imagine Richmond Hill, Ontario as the site of the largest astronomical observatory in Canada. As part of the GTA — the Greater Toronto Area —…



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Snows of Kilimanjaro: For How Much Longer?

One of a growing number of isolated remnants of Kilimanjaro ice spires, once full glaciers. Lonnie Thompson, Ohio State University The iconic snows of Kilimanjaro still exist–but for how long? The remaining ice fields atop…