Raven Hanna lives on the big island of Hawai'i, and her backyard is a picture of what most of us see when we hear the phrase tropical paradise. She has a PhD in molecular biophysics and biochemistry, and she loves science, but she also loves her senses, and the opportunity to immerse herself in the natural world. Her book One Cacao Tree: Backyard Cocoa, Tiny Fermentations, and Chocolate Making in the Tropics is an accessible, tangible guide to every step of cacao's journey, from growing to fe...