"Living fossils, or modern-day animals that very closely resemble their ancient relatives. Meet the coelacanth, horseshoe crab, dragonfly, tuatara, nautilus, and Hula painted frog. All are living fossils. Why have they changed so little over time, while other animals evolved or went extinct? Using contrasting 'then' and 'now' illustrations, veteran nonfiction writer Caroline Arnold alternates between a prehistoric creature in its native environment and its contemporary living-fossil counterpart"--Amazon.com. Interest Level: 3-6 Reading Level: 6.4 ATOS Book Level: 5.9 AR Interest Level: MG AR Points: .5 AR Quiz: 182110EN Lexile Measure: 1040.