The new discovery could potentially help scientists solve the puzzle of the Tiwanaku civilization's disappearance.

This miracle plant was eaten into extinction 2,000 years ago—or was it? Silphion cured diseases and made food tasty, but Emperor Nero allegedly consumed the last stalk. Now, a Turkish researcher ...

They've named the site Valeriana, and it's thought to have been built over a thousand years ago. Surveying an area of 50 square miles, the study revealed more than 6,000 structures, ...