WATERMELON SNOW

WEATHER FACT: snow isn’t always white.   In California’s Sierra Nevada mountains and the alpine region of Colorado, pink snow is occasionally spotted.  It’s caused by a microscopic reddish-colored algae that thrives in high altitude water kept freezing year round.  This sometimes dark red snow puzzled mountain climbers for centuries. Also known as watermelon snow, blood snow, red snow and snow algae, the first accounts of watermelon snow are found in the writings of Aristotle.http://en.wikipedia.org/wiki/Watermelon_snow