Scientists analyze tree rings to determine the age of a tree; one ring usually represents one year of growth.

Amazonian tree rings reveal past rainfall
Amazonian tree rings reveal past rainfall, By Planet Earth Online, Oct. 8, 2012, EarthSky.org "Scientists used tree rings from just eight cedar trees in Bolivia to make a detailed picture of rai
Build a Tree-Ring Timeline
Build a Tree-Ring Timeline by Rick Groleau PBS.org 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
Dendrochronology
Dendrochronology Wikipedia.org Dendrochronology or tree-ring dating is the scientific method of dating based on the analysis of patterns of tree-rings. Visit the website for images and the re
Forests: How Do We Know? Tree Rings
Forests: How Do We Know? Tree Rings Illinois State Museum Article with illustration on how trees grow and how scientists use tree rings for reconstructing past climate.
Giant Sequoias Yield Longest Fire History from Tree Rings
Giant Sequoias Yield Longest Fire History from Tree Rings UA News University of Arizona An article on the tedious procedure scientists undergo to gather the history of a tree by analyzing tree
How To Read Tree Growth Rings
How To Read Tree Growth Rings Uploaded by nmsuaces October 16, 2009 Video length: 04:27.
Studying Climate Change - Tree Rings
Studying Climate Change - Tree Rings Paleontological Research Institution Cornell University Tree rings are a good place to start thinking about how climate researchers get information about pa
Tree Ring Dating
Tree Ring Dating By W.P. Armstrong Wayne's World How do scientists determine how old a tree might be? Read and learn about the increment borer that scientists use. Great photos!
Tree Ring Videos
Tree Ring Videos, Dr. Henri D. Grissino-Mayer, Department of Geography, The University of Tennessee, Links to several videos the professor has posted on YouTube.
Tree Rings
Tree Rings By Paul James, UK Microscopy-UK Magazine Article with numerous large tree ring photos!!
Tree rings map 700 years of Asian monsoons
Tree rings map 700 years of Asian monsoons Richard A. Lovett Nature News Historical rainfall across the region documented for the first time. Visit the web site for the article.
Tree rings record Lake Erie water levels, could predict their future
Tree rings record Lake Erie water levels, could predict their future By Rachael Gleason Great Lakes Echo Sept. 24, 2009 An Ohio professor finds answers to Great Lakes climate questions in an u
Tree Rings Reveal Forest Fires from Hundreds of Years Ago
Tree Rings Reveal Forest Fires from Hundreds of Years Ago Sep. 7, 2011 ScienceDaily.com "Like clues from an Agatha Christie mystery novel, trees can provide secrets about past events, and their
Tree Rings tell many Tales
Tree Rings tell many Tales Pitara Kids Network Woodpecker Volume 2000; Illustration by Shinod AP Interesting article on how scientists study old trees to learn about past climates.
Tree rings: Chainsaws at dawn
Tree rings: Chainsaws at dawn Tuesday, 25 May 2010 The Independent More data than the age of a tree can be determined from tree rings; this article explains that they also reveal what the climate
Webrangers Activity: Dendochronology
Webrangers Activity: Dendochronology US Department of Interioir Learn to tell time with tree rings.