It has also been a project in itself to ensure the dendrochronologists
are able to access these beams safely and expediently.
have deciphered a far more complex language that conveys stories, not just dales, otherwise hidden by the ravages of time.
Starting about 1930, tree-ring dating enabled dendrochronologists
to determine the construction dates of ancient buildings.
, who determine the dating of past events by examining the growth rings in trees, concluded that stream flows in parts of Colorado were the lowest in 300 years.
came up from Oxford to date samples of the oak framing.
The rings in a trunk are its layers of sapwood and by studying them, scientists called dendrochronologists
(den-dro-chro-nol-o-gists), learn about the climate of the past.
At his opening address at the 12th Nobel Symposium on Radiocarbon Variations and Absolute Chronology  in Uppsala, Nobelist Kai Siegbahn emphasized that "This subject is [now] interesting to specialists in many different fields, as can be seen from the list of participants, showing archaeologists, chemists, dendrochronologists
, geophysicists, varved-clay geologists, and physicists" (Ref.
Libby, for which he was awarded a Nobel Prize in 1960, and its improvement by dendrochronologists
(scientists who study the past through analyzing the growth rings of trees) have discovered that fire burned through most of the Missouri Ozark uplands on an average of every 3 to 15 years.
The ITRDB is a collection of accurately dated tree-ring records developed by dendrochronologists
over many years, and is continuously expanding as new data sets become available.