Country Scientist —  How to Study Tree Rings


Annual growth rings in trees provide valuable information about past precipitation, climate, major volcano eruptions, and forest fires.

Forrest M. Mims III

Forrest M. Mims III (, an amateur scientist and Rolex Award winner, was named by Discover magazine as one of the “50 Best Brains in Science.” His books have sold more than 7 million copies.

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