Add Yahoo as a preferred source to see more of our stories on Google. Getty Images You're rummaging through the cabinets at an estate sale, and you come across a set of 12 beautifully etched wine ...

Scientists in Spain investigated which characteristics of crystals may have made them so fascinating to our ancestors.

For hundreds of thousands of years, our hominin ancestors collected crystals. Something about these stones made them desirable, even when they weren’t used for anything. But then why collect them at ...