(See Create a DNA Fingerprint.) Every year a new ring of growth is added to a tree's trunk and branches, just beneath the bark. The thickness of this ring depends on how much the tree grows during ...

After carefully counting each ring of the tree, paleobotanist Scott Wing determined that the tree lived for 260 years, although he admits that may not be exactly correct. Each ring on the sequoia ...

Bristlecone rings, which vary in width year to year ... "in the persistent ability of a 4,000-year-old tree to shut up shop almost everywhere throughout its stem in a very dry year, and faithfully ...

A study of tree rings in the Gaspésie’s Sainte-Anne River area reveals that snowpacks have been declining noticeably in the ...

Quebec tree rings dating back nearly 200 years indicate snowpack in the Gaspésie mountains has declined considerably in ...