Add Yahoo as a preferred source to see more of our stories on Google. When you buy through links on our articles, Future and its syndication partners may earn a commission. New model suggests an ocean ...

Gold’s rarity on the surface of Earth makes it a treasured resource, but the precious metal is not nearly as sparse in the planet’s deeper layers. The Earth’s mantle contains gold, especially in spots ...

Located in Sicily, Mount Etna is Europe's most active volcano. Yet its origin remains largely enigmatic, as no existing ...