Bristol Zoo in the context of "Quoll"

Dendrochronology (or tree-ring dating) is the scientific method of dating tree rings (also called growth rings) to the exact year they were formed in a tree. As well as dating them, this can give data for dendroclimatology, the study of climate and atmospheric conditions during different periods in history from the wood of old trees. Dendrochronology derives from the Ancient Greek dendron (δένδρον), meaning "tree", khronos (χρόνος), meaning "time", and -logia (-λογία), "the study of".

Dendrochronology is useful for determining the precise age of samples, especially those that are too recent for radiocarbon dating, which always produces a range rather than an exact date. However, for a precise date of the death of the tree a full sample to the edge is needed, which most trimmed timber will not provide. It also gives data on the timing of events and rates of change in the environment (most prominently climate) and also in wood found in archaeology or works of art and architecture, such as old panel paintings. It is also used as a check in radiocarbon dating to calibrate radiocarbon ages.

Clifton is an inner suburb of Bristol, England, and the name of one of the city's thirty-five electoral wards. The Clifton ward also includes the areas of Cliftonwood and Hotwells. The eastern part of the suburb lies within the ward of Clifton Down.

Clifton is home to Isambard Kingdom Brunel's Clifton Suspension Bridge; many buildings of the University of Bristol, including Goldney Hall; the Roman Catholic Clifton Cathedral; Christ Church, Clifton Down; Clifton College; Clifton High School; the former Amberley House preparatory school; Queen Elizabeth's Hospital School, The Clifton Club; and Bristol Zoo. It is also noted for the Downs, a large, open park.