As I was growing through my school years, the principle of evolution was presented as a fact. My teachers believed that it was the "only way it happened." I too was entrenched into this mode of thinking. How could all the knowing scientists, films, and textbooks be wrong? It did seem to explain ...

Plants are unique amongst the eukaryotes, organisms whose cells have membrane-enclosed nuclei and organelles because they can manufacture their food. Chlorophyll, which gives plants their green color, enables them to use sunlight to convert water and carbon dioxide into sugars and carbohydrates; che...