SWIRLING SNAIL The shell of the fantastic Opisthostoma vermiculum snail looks rather more like an elaborate Dr. Seuss instrument than a product of Darwinian evolution. Although most snails slither under a spiral shell that wraps tightly around a single axis as it grows, this new species, discovered in Malaysia, boasts four separate axes—making it the most convoluted snail known... CLEMENTS/WORLD WILDLIFE FUND FOR NATURE—MALAYSIA