"A playful, witty, and resonant novel in which a single mother and her two teen daughters engage in a wild scientific experiment and discover themselves in the process, from the award-winning writer of Sons and Daughters of Ease and Plenty Jane is a serious scientist on the cutting-edge team of a bold project looking to "de-extinct" the wooly mammoth. She's privileged to have been sent to Siberia to hunt for ancient DNA, but there's a catch: Jane's...

For 150 million years, dinosaurs were the undisputed rulers of the Earth--and they still fire our imaginations. Using the latest paleontological research, Encyclopedia of Dinosaurs describes the creatures who lived during the great Age of Reptiles, the real-life giants and monsters such as the Tyrannosaurus rex and Stegosaurus who once dominated our planet. Entries are arranged by chronological period, running from the Triassic through to the late...

"Engaging images accompany information about the megalodon. The combination of high-interest subject matter and light text is intended for students in grades 2 through 7"--

"Teeth, tails, and scales-oh my! Newly independent readers will be transported back to a time when bugs were big and monsters ruled the deep. Each page of this dazzling Level 2 reader is packed with jaw-dropping facts on the fiercest predators of the ancient oceans. Learn about Megalodon, the largest shark ever to have lived; Jaekelopterus, a human-size scorpion; Helicoprion, a fish whose teeth were in the shape of a circular saw; and more!"--

The reader's choices determine whether two classmates will survive after being mysteriously transported back in time to when exotic plants towered overhead and giant rat-like creatures scuttled on the ground.

"This book features fascinating information on all the major types of dinosaur as well as ancient fish, other prehistoric reptiles in the air or water, and early mammals. Dinosaur reconstructions and the latest fossil finds bring back to life the bone-crunching teeth of the Tyrannosaurus rex, the astonishingly large body of the Argentinosaurus, and the plane-sized wings of the soaring Hatzegopteryx. Each page reveals new facts from the latest paleontological...

Viaja atrás en el tiempo y descubre las criaturas más grandes, rápidas y extrañas qu han existido jamás. Date u chapuzón con un plesiosaurio del tamaño de un autobús, corre junto a un dinosaurio más rápido qu un caballo al galope y vigila al gran felino de dientes largos como dagas. Prepárate para descubrir más de 40 increíbles animales prehistóricos que cobran vida gracias a la recreación de las imágenes generadas...

Geronimo and his friends participate in a treasure hunt set up by his rival and are determined to overcome all of its challenging obstacles, including tricky riddles and smelly dinosaurs. "En Petrópolis está a punto de comenzar el juego de la Búsqueda del Tesoro más superratónico de la Edad de Piedra. Valiéndose de una serie de pistas misteriosas y chocantes, Geronimo Stiltonut y sus amigos tendrán que resolver adivinanzas y otras pruebas...