ON THE NBC nightly news there was a heart-throb report of an attractive British teen-ager who had skied across the North Pole with her father to demonstrate how the Arctic ice pack is receding in the face of global warming. Oh, horror. Oh, how terrible. The pictures were beautiful: Her pretty face, her gentle smile, her soft voice, her snow-crusted parka, the blue skies, the brilliant white ice, the cascading chunks of ice calving from glaciers, the two penguins standing on an ice flow. Wait a minute. Penguins? At the North Pole? Not that we ever heard of. So much...