A single yellow leaf hanging on a white birch tree glows from autumnal back-light, Boston Massachusetts. (Sam D'Amico)
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During the spring and summer,leaves get their green color from chlorophyll, a pigment needed for photosynthesis. As the sunlight wanes during the Fall the chlorophyll [...]
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Recently I implemented a new way to receive comments from students. Please visit this page if you’d like to see comments that were made by students prior to the implementation of the new system.
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