You don't need to be a coin collector to know that certain nickels, dimes, quarters, half dollars and the like are worth ...

Jo Marchant, Nature In 1900, Greek divers rifling through an ancient shipwreck recovered dozens of bronze fragments that turned out to be parts of a 2,000-year-old mechanical calendar. Now ...

“It’s really Rome’s age-old challenge: How do you balance the needs of the modern city with its historical identity?” says Paolo Liverani, curator of antiquities at the VaticanMuseum.