One of the most beautiful things about fall is that the trees do not all change at once. They do not all turn the same color. They do not even respond to the season in exactly the same way. As daylight shortens and temperatures cool, chlorophyll begins to break down. The green fades, revealing pigments that were there all along, while other pigments develop in response to sugars, light, weather, and the biology of the tree itself. That is why one tree turns gold. Another turn
