Is Fresh Snow Always White? By Emily V. Driscoll published 16 November 12 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 21 March 08 A sled dog's thick fur can be used to detect mercury contamination in the environment and possibly in humans.
