Why is Earth called the Blue Planet? Because there's so much water on the surface that the planet looks blue from outer space! Marine biology is the study of the plant and animal life in salt water environments, from microscopic plankton to the largest animal on earth, the blue whale. In Marine Biology: Cool Women Who Dive readers ages 9 to 12 explore the careers of three women who work within the science of marine biology--Natalie Arnoldi, Ashanti Johnson, and Lauren Mullineaux. Nomad Press books in the Girls in Science series supply a bridge between girls' interests and their potential futures by investigating science careers and introducing women who have succeeded in science. Compelling stories of real-life scientists provide readers with role models that they can look toward for examples of success. Marine Biology uses engaging content, links to primary sources, and essential questions to whet kids' appetites for further exploration and study. This book explores the history of marine biology, the women who made key discoveries, and the multitude of varied careers in this exciting and important field. Marine Biology encourages both boys and girls to envision what lies beneath the miles of water that make up our planet.