A recent clinical trial involving several members of the Caenorhabditis elegans species in Seattle showed that the worms that given antidepressants lived up to 31% longer than their unmedicated brothers and sisters. Of course, the scientists at the Fred Hutchinson Cancer Research Center hope to someday apply this longevity trick to expand humans' time on earth. Currently, our average lifespan on earth is 67 years. If everything goes as planned, this happy drug remedy will raise that number to 88. Image by AP. [New Scientist]