Well, tree-ring dating, or dendrochronology, can be this precise, and even more so. Dendrochronologists showed that an ancient wooden road uncovered in southwestern England not only was built in ...

The challenge is to find forests with both strong climate-growth relationships and trees over a century old — substantially ...

The basis of the science lies in a tree's unique pattern of growth rings, which acts as a kind of fingerprint. Every year a new ring is added to a tree's trunk and branches, just beneath the bark.