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. (The ...

The science of dendrochronology observes changes in the pattern of tree rings in an attempt to create a time line and infer climate changes. Using tree ring data, it is possible to link the past ...

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 precisely, ...