In her book "Pilgrim at Tinker Creek," Annie Dillard explores the intricate relationship between chlorophyll, chloroplasts, and the foundation of life in the planted world. She describes chlorophyll as composed of a specific arrangement of hydrogen, carbon, oxygen, and nitrogen atoms, highlighting its essential role in photosynthesis and the vibrancy of plant life. The chloroplasts, which house these molecules, navigate through water, contributing to the lush greenery we observe in nature.

Dillard also makes a profound connection between chlorophyll and hemoglobin by noting that replacing magnesium in chlorophyll with iron transforms the molecule into hemoglobin. This shift illustrates the fascinating interplay between plant and animal life, as hemoglobin serves to transport oxygen in the blood of animals, such as goldfish. Through this comparison, she emphasizes the remarkable complexity and unity of life forms through their shared chemical foundations.