Ned, a pale-bodied snail crawls across a leaf in a small town in the Waiararapa, New Zealand, on Aug. 22, 2025. (Giselle Clarkson via AP) I knew that there were right-eyed and left-eyed flounder, but ...

Imagine a snail so tiny it can sit on the tip of your finger, living quietly in the mudflats of one of the world’s best-known rivers. Now think back to that snail, coated in minuscule hairs, a strange ...