TREES HAVE STORIES to tell. Within their annual growth rings are records of drought and deluge, but scientists can also use them to reconstruct environmental pollution events. Tree rings can be used ...
How do you determine the age of a tree? Just count the rings, of course! One ring equals one year of growth. If you’ve ever stumbled upon a tree stump you may have even done it yourself. But if you’re ...
Dendrochronologists extract a small, pencil-shaped sample of wood from a tree with a tool called an increment borer. The tiny hole left in the tree's trunk quickly heals as the tree continues to grow.
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