In the southern hills of the Mexico state of Coahuila, water bubbles from below the surface to create crystal clear pools between the rocks. The freshwater springs are known as Los Chorros, the jets, ...

If you look at a snail's shell, the chances are it will coil to the right. But, occasionally, you might find an unlucky one that twists in the opposite direction - as fans of Jeremy the lefty snail ...

Leeches might seem like relics of a bygone age of medicine, but they haven’t outlived their usefulness to people yet. The freshwater leech Helobdella austinensis can eat its weight in snails every day ...