Ant Invasions!

New Scientist reports that, with the advent of global warming, the earth could come under a series of deadly ant attacks. Unfortunately these will not be the frigate-sized mutant ants of 1950s sci-fi. Instead, warming temperatures tend to decrease individual ant size but radically increase the number of ants per colony. This would lead to hideous ant invasions, of the sort I remember seeing once in an episode of MacGyver. (MacGyver saved the day by flooding an irrigation system to stop the ants. I think he used gasoline or something to make a wall of fire, too. Hey, I haven't seen it since I was seven. It made a big impression on me, but obviously not that big.)