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Originally developed for climate science, the method is now an invaluable tool for archaeologists, who can track up to 13,000 years of history using tree ring chronologies for over 4,000 sites on six continents.

Dendrochronology is a dating technique that exploits the annual growth increments of trees to provide a precise estimate of the age (or period since formation) of a wood sample. New cells, forming a ring, are added to the outer part of a tree trunk during each growing season.

Archaeologists ask questions and develop hypotheses. They use evidence to choose a dig site, then use scientific sampling techniques to select where on the site to dig. They observe, record, categorize, and interpret what they find. Then they share their results with other scientists and the public.

Dendrochronology is a dating technique that exploits the annual growth increments of trees to provide a precise estimate of the age (or period since formation) of a wood sample. New cells, forming a ring, are added to the outer part of a tree trunk during each growing season.

Each ring marks a complete cycle of seasons, or one year, in the tree's life. As of 2020, securely dated tree-ring data for the Northern Hemisphere are available going back 13,910 years.

Rings of trees growing in temperate climates can indeed tell their age through their annual rings and also help determine the age of wood used to construct buildings or wooden objects.

To find the specific age of an object, archaeologists use absolute dating. Absolute dating methods measure the physical properties of an object itself and use these measurements to calculate its age. One of the most useful absolute dating methods for archaeologists is called radiocarbon dating.