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.

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 ...

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