A study of animals across the world has confirmed what many men have long suspected - a large penis can be a recipe for success in the mating game. The value of an impressive organ depends on the terrain, however. Animals at high latitudes tend to benefit more from being better endowed than species in more hospitable climes, according to Steven Ferguson of the Freshwater Institute in Winnipeg, Canada, and Serge Larivière from the Delta Waterfowl Foundation in Portage La Prairie, Canada. The researchers compiled data on the size of the penis bone, called the baculum, in 122 carnivorous mammal...