Gone are the vast Highland forests of Scotland. Gone are the oceans of grass that graced the North American plains. Gone too are the lush Bahamian jungles that greeted Christopher Columbus and his sea-weary men. Today these lost landscapes, like vanished civilizations, exist only as mirages that dance in the mind's eye. And until recently, any notion that such priceless heirlooms might be reclaimed would have been dismissed as hopelessly quixotic.
Now, however, some daring naturalists are starting to suggest that just as a smashed vase can be pieced back together and a war-torn cathedral reconstructed stone by stone, so too...