Pristine white sand dollars have long been the souvenir to commemorate a successful day at the beach. But most people who pick them up don’t realize that they’ve collected the skeleton of an animal, ...

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Sand dollar skeletons and fossils turn Ocean Beach into a living lab—perfect for a family day trip. Sand dollar skeletons, or “tests,” wash up in great numbers on San Francisco’s Ocean Beach.

There’s a disappearing island off North Carolina’s coast only accessible by boat where you can find buried treasure. Sand Dollar Island, which is really just a large sand bar most accessible at low ...

Sand dollars are flattened, disc-shaped sea urchins that live in high-energy coastal environments across the globe. Why they evolved this atypical morphology remains a mystery. This project aims to ...