For the first time, scientists have figured out where we sit on the global food chain. Although humans are clearly top chefs of the world, we're not the top predator. Instead, our ranking is closer to a small, smelly fish that we put on pizzas and salads.
In December 1993, President Clinton signed the North American Free Trade Agreement into law. Presidential candidate Ross Perot predicted Americans would hear a "giant sucking sound" as Mexico vacuumed up U.S. jobs. Economists say that the worst of Perot's fears never materialized. But opponents still see downsides.