Beachgoers on a popular stretch of U.S. coastline have been stopping in their tracks at the sight of translucent, blue and white blobs scattered along the high-tide line. The creatures look almost ...

Do you really know who you’re sharing the beach with? Purple sand dollars gobble bits of metal to stay grounded in turbulent waters. Mole crabs move sand like a conveyor belt. Hardworking bees sculpt ...