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Summer is the time when many people go to the woods, either for camping, hiking, bird watching or other activities. Often these trips are to state or national parks, where you are not allowed to collect any rocks, plants, etc. Even so, you don't have to come home empty handed. If you go prepared, you can bring home a variety of animal tracks.

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Learn an easy technique for collecting fingerprints.

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Can you tell which pen was used to write a message? Of course you can, if you know the science of chromatography.

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