This is a house... and a skeleton. But you probably know it as a snail shell. Snails are actually born with their shells when teeny tiny snails hatch out of their eggs, they already have a shell ...

This article was originally featured on The Conversation. Wander through your backyard or walk along a stream and it’s likely you’ll see a snail – small, squishy animals with shells on their backs.

Over the past two decades, the Gulf of Maine has become a popular landing spot for invasive species from across the world, ...