When Chelsea Wood was a child, she would often collect Periwinkle snails on the shores of Long Island. “I used to pluck them off the rocks and put them in buckets and keep them as pets and then ...

Science has not exactly been kind to the rough periwinkle. For one, taxonomists keep forgetting the species, known to malacologists as Littorina saxatilis, exists. It’s been “discovered” so many times ...