Hermit crabs have an odd housing situation. Rather than produce their own shells like other crustaceans, they must find an empty shell made by a completely different species, marine snails, in order ...

Francis Horne, a biologist who studies shell formation at Texas State University, offers this answer. The exoskeletons of snails and clams, or their shells in common parlance, differ from the ...

Aurelie Moya receives funding from the Australian Research Council. Curious Kids is a series for children. If you have a question you’d like an expert to answer, send it to curiouskids@theconversation ...