"Determined to show Ronnie just how interesting prehistoric life was before the age of the dinosaurs, Miss Lernin takes her back in time to the six parts of the Paleozoic era to study the earliest lifeforms on Earth, and how many left the ocean for life on land"--Provided by publisher.
Fifth-grader Ronnie and Ms. Lernin tour the Cenozoic Era, where they encounter three kinds of mammals--monotremes, marsupials, and placental mammals--and other animals with which they shared the Earth.
Learn many prehistoric facts---and some hilarious jokes---with Miss Lernin and Ronnie as they visit the Paleozoic era and explore the earliest life-forms on Earth.
