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The Wall Street Journal has a look at global warming research using rubber duckies. The toys have been employed in tracking ocean currents since 1992; but recently NASA robotics expert Alberto Behar released 90 yellow rubber ducks into the melt water flowing down a chasm in a Greenland glacier. "Each duck was imprinted with an email address and, in three languages, the offer of a reward. If all goes well, Dr. Behar hopes that one day they will emerge 30 miles or so away at the glacier's edge in the open water of Disko Bay near Ilulissat, bobbing brightly amid the icebergs north of the Arctic Circle, each one a significant clue to just how warming temperatures may speed the glacier's slide to the sea."