Sundogs, also known as mock suns or "parhelia", are a pair of brightly colored spots, one on either side of the sun. Sundogs form as sunlight is refracted by hexagonal plate-like ice crystals with ...

Ice crystals in Earth's atmosphere sometimes align just right to create various striking visual effects, from a halo around the moon, to bright spots called sundogs on either side of the sun in a ...

One morning a few weeks ago I stood at one of the picture windows in the Beaver Meadow Nature Center waiting for a meeting to begin. I was idly watching the birds at the feeders when I felt a firm ...