3_3 TWO BOOKS OF BIOCHEMISTRY AND ONE OF QUANTUM MOLECULAR DYNAMIC - CHERRY LEAF This is a cherry tree leaf fallen in autumn. The red and and yellow colors suggest an organized and sophisticated dismantling of the chlorophyll and other leaf substances. What are the enzymatic pathways followed, why chlorophyll does not absorb green light, what is that gives the yellow and red hues, how and why? I still don’t know, but I guess we will need at least a book of biochemistry and one of heavy molecular simulation, just to have a coarse description of what is going on about the green and the yellow. Plus one book to understand why and how of the red.. Subject: fallen cherry leaf - Likely Prunus serrulata Lens: Sagem 569937 350mm f/9 at close distance (1:10 reproduction ratio, near its optimal) Theme 3: AUTUMN COLORS Nature offers an astonishing variation of forms and shapes to be photographed; but an even larger amount of engineering solutions accumulated through evolution is hidden into one simple word: biochemistry. How to visualize this molecular richness? One direct way is by color, our built-in spectrographic analysis tool, a narrow but easy peek into the electrons configuration of molecules.