It's no secret that we need calories to fuel our body's basic energy needs. Yet many of us find it difficult to take in the right amount—and the right kind—of fuel. No matter how many guidelines we're given, we still crave what we know is bad for us.
Reading a road map upside-down and generating synonyms for the word "brilliant" are two very different skills. But each is a measurable indicator of general intelligence, a construct that includes problem solving abilities, spatial manipulation and language acquisition.