In the frigid landscapes of northern Norway, an unusual phenomenon etched into the rings of trees and shrubs has offered a glimpse into the Earth's climatic history. Scientists have discovered ...

Assessing the age of a living tree is straightforward enough—just extract a core from the tree's circular trunk and count the number of lines in the core formed by the tree's annual growth rings.

If you're the skeptical type, you might raise an eyebrow when you hear that a particular Viking ship was built in the year 819. How could anyone determine the age of such an aged object so ...