This book tells the story of the enormous Apatosaurus, who lived during the late Jurassic period between 170 and 140 million years ago. It weighed up to 33 tons (30 metric tons), was more than 65 feet (20 meters) long, yet ate only plant food. It had bony skids on the underside of its long tail to protect the soft parts.
In this compelling title, students are encouraged to dig in and discover how different plant fossils unlock clues to the Earth's past. Through full-color photographs and thought-provoking questions, students will investigate how plants fossils form, how they are excavated, and how paleobotanists study them to learn about life millions of years ago.
This fascinating title chronicles the U.S. bombing of these Japanese cities during World War II. Topics include the development of the atomic bomb, Truman's decision to drop the bombs, and the long-term consequences of this historical event. Primary source accounts present reactions from both sides.
In 1922, archaeologist Howard Carter discovered King Tutankhamen's tomb. In addition to unearthing astonishing artifacts, Carters discovery revealed fascinating details about King Tut's life and provided insight into ancient Egyptian culture. Engaging, approachable text and vivid images take readers inside the pharaoh's tomb as they discover ancient treasures and learn how such artifacts shed light on King Tuts reign, his family's dynasty, the mystery surrounding his death, and the theories of King Tut's curse
This captivating title examines the eruption of Mt. Vesuvius that destroyed Pompeii in 79 A.D. and what the remnants of this buried city can teach us today.
The robots of today do more than just heavy lifting. Machines that can sense the world and make decisions are now being used in space, industry, medicine, and the military. This adventurous book follows the development of robots over the past century and describes how modern robots continue to revolutionize different fields making our lives easier, healthier, safer and more exciting.
This gripping title traces the causes, symptoms, and treatment of plague through the height of the Black Death in Europe and into the modern day.
For centuries, exploration of the Arctic has been pursued for its potential value as a commercial sea route. Many expeditions tried in vain to navigate its frozen waterways. This timely book tells the stories of famous expeditions to find a Northwest Passage from the Atlantic to the Pacific, to map the frozen wasteland, and to be the first to reach the North Pole.
One hundred years after its tragic voyage, the Titanic continues to capture our imaginations. This fascinating title looks at the building, voyage, sinking, and rediscovery of the Titanic.
On January 24, 1848 a man named James W. Marshall found gold at Sutter's Mill in Coloma, California. This compelling title explains how Marshalls discovery sparked gold fever and lured thousands of people west in search of great fortunes. Primary source accounts and historical photographs trace the history of the gold rush in California as well as the later Klondike gold rush.
To be a spy in today's high-tech world, you've got to specialize whether you're keeping tabs on foreign governments, fighting terrorist organizations, or stopping cyber espionage. This fascinating book describes spying throughout history, the gadgetry of a spy, and what kind of training is required to join intelligence-gathering agencies around the world.
This captivating title looks at extinction--from the dinosaurs, 65 million years ago, to the possible extinction of species in our world today.
This fascinating title brings ancient history to life with a clear, easy-to-understand overview of the Mayan culture and the mystery surrounding their calendar.
This book tells the story of Tylosaurus, which swam in the prehistoric seas between 87 and 82 million years ago. It was a fierce marine reptile that used its sharp teeth and huge jaws to feed on sharks and other marine reptiles, such as plesiosaurs, as well as fish. A Tylosaurus could grow as long as 50 feet (15 meters) and was a superb swimmer.
This book tells the story of Triceratops, a dinosaur that was heavier than a present-day elephant with three large horns on its head and a neck frill. It looked fierce but it was actually just a plant eater. It used its horns to defend itself against predators. Triceratops lived in herds for protection.
This book tells the story of Parasaurolophus, who lived 76 to 74 million years ago during the Cretaceous period. It belonged to a group called hadrosaurs, or duck-billed dinosaurs, named after their flat beak. Parasaurolophus had a long crest that swept back over its head. The crest was hollow, and Parasaurolophus probably used it to make deep honking sounds.
This book tells the story of Stegosaurus, who lived during the Jurassic period between 155 and 145 million years ago. It had large bony plates, which it probably used for temperature control, soaking up the sun, or catching a cool breeze.
This book tells the story of Pteranodon. During the late Cretaceous period, between 89 and 80 million years ago, one of the largest flying reptiles to exist flew in the skies. Its large wingspan and short tail made it very agile so it could turn or dive quickly. Its head could measure nearly six feet (two meters) long and on the back of its head grew a magnificent crest.
This book tells the story of the Woolly Mammoth, an animal that lived during the last Ice Age. Its long outer hair and inner layer of wool helped it withstand the bitterly cold conditions. Huge curved tusks were used to dig for food under the snow and as a powerful weapon against enemies. The Woolly Mammoth weighed up to six-and-a-half tons (six metric tons) and stood ten feet (three meters) tall.
This book tells the story of Spinosaurus, a dinosaur with large jaws, sharp teeth, and a huge sail on its back that stood six feet (two meters) tall. Around 40 feet (12 meters) long, it was one of the largest meat eaters. Spinosaurus lived during the late Cretaceous period around 95 million years ago.
This intriguing new title invites students to walk with the dinosaurs, learning about what they looked like, what they ate, and how they lived. From fossilized teeth to ancient footprints, students will explore how studying the different parts of a dinosaur fossil show paleontologists how these amazing creatures lived before their mass extinction over 65 million years ago.
Since the discovery of Lucy, one of the most famous human skeletons ever discovered, paleontologists and people alike have been fascinated with human fossils. In this book, students will follow the timeline of key discoveries in human fossils, and learn how scientists continue to link together the evolution of humanity using evidence from the past.
Perfect for the budding paleontologist, this book brings to life animals that lived long ago. With clear text and engaging questions, a full range of fossils from microscopic insects to gigantic prehistoric mammals is examined. Students are encouraged to discuss the idea of living fossils and examine how fossilized animals have adapted into life forms still present today.
Readers will discover that the natural element carbon is found in all living things, including people. This fascinating book explains how the Earth's supply of carbon moves among Earth's oceans, atmosphere, ecosystem, and geosphere in a process called the carbon cycle. Accessible text and detailed images help explain such processes as photosynthesis, respiration, and decomposition. Feature boxes highlight examples of the ways in which human activity, such as burning fossil fuels, releases too much carbon dioxide into the air disrupting the balance of the carbon cycle. Readers are encouraged to find ways to take action and find solutions.
This exciting title explores the groundbreaking modes of transportation that have helped define the modern age. From Henry Ford's Model T car to the bullet trains of Japan, students will travel along and learn about the monumental successes and failures that have driven our world ahead.