(W/A/CA) Abby Howard. When Ronnie's parents go on a business trip and leave her with Miss Lernin for the week* Ronnie is sure she's in for a big* dinosaur-size adventure. So* when they end up at the aquarium's jellyfish exhibit* Ronnie is confused. Surely jellyfish aren't as cool as dinosaurs* right? Wrong! 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.