James "Gum" Shoo and his friends are on a trip to the River City Natural History Museum, where they discover that a small dinosaur model and some chickens have both gone missing--and the four sixth-grade detectives promptly set out to discover who is behind the theft.

What happened to the dinosaurs? For millions of years these fantastic creatures roamed our planet. Then, suddenly, they all disappeared. Scientists wonder why. What could have caused this huge extinction 65 million years ago? In this enlarged edition, distinguished writer Franklyn M. Branley and award-winning artist Marc Simont provide the perfect introduction to an always fascinating subject - the disappearance of the dinosaurs. Outstanding Science Trade Books for Children 1989 (NSTA/CBC)

Danika is just as surprised as her audience when her magic trick works and Bigs' favorite toy disappears, prompting Jigsaw and Mila to investigate.

For centuries, science has been searching for clues to the disappearance of the dinosaurs without answering a critical question - Are all the dinosaurs really extinct? In The Mistaken Extinction: Dinosaur Evolution and the Origin of Birds, crackerjack paleontologists Lowell Dingus, President of Infoquest, a nonprofit education and research foundation, and former Director of the Fossil Hall Renovation at the American Museum of Natural History and Timothy Rowe, J. Nalle Gregory Regents Professor of Geology at the University of Texas, Austin, and Curator of Vertebrate Paleontology at the Texas Memorial Museum lead us on an adventurous tour through the history of our own planet Earth. And they force us to face a shocking truthThe answer to that critical question is no.

More than a hundred years ago, Sir Arthur Conan Doyle wrote a novel called The Lost World with the exciting premise that dinosaurs and other prehistoric beasts still ruled in South America. Little did Conan Doyle know, there were terrifying monsters in South America--they just happened to be extinct. In fact, South America has an incredible history as a land where many strange creatures evolved and died out. In his book Giants of the Lost World: Dinosaurs and Other Extinct Monsters of South America, Donald R. Prothero uncovers the real science and history behind this fascinating story. The largest animal ever discovered was the huge sauropod dinosaur Argentinosaurus, which was about 130 feet long and weighed up to 100 tons. The carnivorous predator Giganotosaurus weighed in at more than 8 tons and measured more than 47 feet long, dwarfing the T. rex in comparison. Gigantic anacondas broke reptile records; possums evolved into huge saber-toothed predators; and ground sloths grew larger than elephants in this strange, unknown land. Prothero presents the scientific details about each of these prehistoric beasts, provides a picture of the ancient landscapes they once roamed, and includes the stories of the individuals who first discovered their fossils for a captivating account of a lost world that is stranger than fiction.

Broadening the basis of information on the topic of the Cretaceous extinction, this book particularly highlights evidence that points away from the global catastrophic scenario, towards a fossil based theory suggesting that a multitude of factors resulted in the period's radical changes.

Dinosaurs disappeared completely from the Earth many, many years ago...or did they? An ALA Notable Children's Book A Kirkus Reviews Best Book of the Year! Millions of years ago, dinosaurs roamed the shores of Mesozoic seas. They lay eggs in the shade of ginkgo trees, and as time went on, dinosaurs grew, and grew, and grew. There were so many different species of dinosaurs. Large, monstrous, and fearsome, they ruled the earth. Until gradually, there were no dinosaurs left. But they didn't disappear completely. Some dinosaurs had feathers, which grew and grew...until all through the skies were hundreds of species of birds, which flew and flew. From the bestselling creator of Dinosaur Dream Dennis Nolan comes a poetic nonfiction picture book about how dinosaurs evolved into birds. A Bank Street Best Book of the Year - Outstanding Merit An ILA-CBC Children's Choice!