Is Fresh Snow Always White? By Emily V. Driscoll published November 16, 2012 Multi-hued snow, usually found in polar regions during the spring and summer months, results from dozens of species of algae. Dust can do the trick, too.
Dog Fur Reveals Mercury Pollution By Emily V. Driscoll published March 21, 2008 A sled dog's thick fur can be used to detect mercury contamination in the environment and possibly in humans.
