A rare purple sea snail (Janthina) washes ashore in San Deigo. Scientists reveal its floating bubble-raft lifestyle, striking violet colour and how ocean currents unexpectedly carried it to the beach.

Turtle shells evolved over the course of 300 million years, but self-defense wasn't the initial driver, researchers think.

When we picture sea turtles in the wild, it’s easy to envision them as armored warriors – their hard, resilient shells serving as near-impenetrable shields against oceanic threats like sharks. These ...