Narwhals, 'Unicorn' Whales, Used By Scientists To Track Arctic Temperatures, Monitor Climate Change Effects

In a paper just published in the Journal of Geophysical Research -Oceans, Steele and other researchers, led by Kristin Laidre, also of the University of Washington, described tagging narwhals with satellite sensors that recorded ocean depths and temperatures during feeding dives from the surface pack ice to the seafloor, as deep as 1,773 meters, or more than a mile.

Read more on Discovery News