CAPRI, Italy (Reuters) - Capri's world has always been blue - the color of the water surrounding the Mediterranean island, many of its fishing boats and, most famously, the light in its Blue Grotto.

Divers off the coast of Naples, Italy have recovered a large chunk of chiseled obsidian that likely went down in a Stone Age shipwreck more than 5,000 years ago. When you purchase through links on our ...