Hidden in the hills of Tuscany, Italy, there's a real medieval sword embedded in stone — and historians have verified it’s over 900 years old. Some say it inspired the legend of King Arthur’s ...

Excavations at a 2,000-year-old settlement in Spain have yielded the first ever trilobite fossil from Roman times. Found in a trash heap associated with a high-status household, the specimen appears ...

Get the latest news headlines and top stories from NBCNews.com. Find videos and news articles on the latest stories in the US.