Jeremy, the rare snail with the left-curling shell whose search for a mate kicked off an international quest, has slithered off this mortal coil. But there's one last twist to the story. Reader, ...

While people and many animals might look pretty symmetrical on the outside, inside our bodies we are all fundamentally asymmetric. For example, the human heart is found to the left of center. Snails ...

The great pond snail is helping scientists make great leaps in their understanding of asymmetries in the animal kingdom. Paul Starosta/Corbis Whether it flies, walks or swims, nearly any given animal ...