Try saying "toy boat" three times fast. By the time you're done, the words will be all distorted. It's a classic tongue twister, but is it your tongue or your brain that's really tangled up?
From flat-screen HDTVs to small, flip-open screens, TV viewing has become part of everyday life, far removed from the luxurious event of watching black-and-white TV in its earliest days. How has this evolution changed America?