Book excerpt: The green sea turtle is a majestic creature that has been in existence for more than 100 million years. Today, however, green sea turtles are in danger of extinction because of the careless actions of humans. This volume presents facts about the green sea turtle's biology, habitat, mating and nesting habits, and diet, before describing the harmful human behavior that threatens its very existence. With beautiful colorful photographs and practical applications for helping to save this and other endangered creatures, readers will learn the importance of conservation.