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Weather Words: Lenticular Cloud

Lenticular clouds form when a moist, stable air mass moves over a mountain.
On June 24, 1947, pilot Kenneth Arnold reported seeing multiple mysterious, gleaming circular objects along the crest of the Cascade Mountains in Washington. It was one of the most famous UFO ...
When an astronaut aboard the International Space Station snapped this photograph of Lago Argentino in Patagonia on December ...