I learned about an increment borer at science camp. This T-shaped tool drills into a tree and takes out a pencil-width cylinder. The kids can count the rings on that sample to find the tree's age.
This girl had great expressions. Above she works hard to drill into a dense Tamarck tree. Below, I like the look of intense concentration as this girl carefully counts the rings on the sample. The wooden piece was also delicate, and often fell apart as soon as she took it out of the device.
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