Did you know that for every human on earth, there are about one million ants? They are among the longest-lived insects--with some ant queens passing the thirty-year mark--as well as some of the strongest. Fans of both the city and countryside alike, ants decompose dead wood, turn over soil (in some places more than earthworms), and even help plant forests by distributing seeds. But while fewer than thirty of the nearly one thousand ant species living...