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 ...

This voice experience is generated by AI. Learn more. This voice experience is generated by AI. Learn more. In hydrothermal vent fields, a small snail evolved an iron-reinforced shell. Here’s how it ...