RedOrbit: Being particularly sensitive to carbon monoxide and methane, canaries were often used by miners as sentinels to determine if the toxic mine-related gases were building up to dangerous levels.
Speaking this week at the annual meeting of the American Association for the Advancement of Science in Chicago, oceanographer Sue Moore said walruses, polar bears and seals can be looked at in much the same way, in that well-being of these Arctic animals are essentially early-warning systems for determining...