Snails have shells the moment they're born, but it's kind of hard to tell. In fact, it's hard to even see a baby snail. Some are nearly microscopic, such as Angustopila psammion, whose adult-sized ...

Symmetry is a feature of many plants, animals and even some molecules -- like water. But that's not the case with snails and their coiled shells. They are chiral -- asymmetrical in such a way that ...