Ursa books (93 resultados)

Paperback. Condición: new. Paperback. From radios to the internet, remote controls to virtual reality, technology has changed everything. Learn how entertainment and information technology makes our lives easier with detailed graphics and the science behind how it all works. Included backmatter comprehension questions ensure a w…

Hardcover. Condición: new. Hardcover. Earth in the Jurassic period was much warmer with seas that teemed with life. Dinosaurs began to rule the land as the first sharks and crocodiles appeared in the water. Explore how life grew, adapted, and changed through the Jurassic Period. Engaging images and informative graphics help expl…

Hardcover. Condición: new. Hardcover. After the extinction event at the end of the Cretaceous Period, only a small number of species survived into the Cenozoic Era. Among those were small mammals who evolved to dominate life on land, including one species called homo sapiens--human beings. Engaging images and informative graphic…

Hardcover. Condición: new. Hardcover. From towering mountains that rise above the surrounding land to hardened magma, the natural world is made up of thousands of different kinds of rock. How do rocks get their different shapes and unique colors? What are the three main rock types? And how have humans throughout history used roc…

Hardcover. Condición: new. Hardcover. Many civilizations have risen and fallen throughout history. Is it possible some cities were lost to the depths of time? According to legends, cities like Atlantis and Lemuria were once strong empires that disappeared completely. In-depth stories and a stunning design will bring readers head…

Hardcover. Condición: new. Hardcover. From catastrophic oil spills to toxic pollution that caused mysterious illnesses, eco-disasters have devastated the environment many times. Designed to captivate middle school readers, this high-interest book spotlights stories of survival through some of the most destructive eco-disasters i…

Hardcover. Condición: new. Hardcover. The Cretaceous Period was the age of dinosaurs. While reptiles ruled the land, animal and plant life thrived across the planet and sea levels reached record highs. Engaging images and informative graphics help explain the development of life on Earth throughout the Cretaceous Period, while a…

Hardcover. Condición: new. Hardcover. From the earliest forms of life in the sea to the first dinosaurs that ruled the land, early life on Earth took many strange forms. Explore how life grew, adapted, and changed across a span of 275 million years from the Cambrian through the Triassic Period. Engaging images and informative gr…

Hardcover. Condición: new. Hardcover. From the preserved remains of prehistoric life to ancient footprints and coprolites, the world is full of fossils that give us a look into the past. How do fossils form? What can they tell us about Earth's many mysteries? And why are they left behind even after the death of their ancient spe…

Hardcover. Condición: new. Hardcover. Schools and libraries are places for knowledge. But what if they contain something even scarier than homework and tests? Travel around the country, visiting real schools and libraries with creepy legends and unbelievable paranormal events. Are the stories of strange figures and unexplained d…

Hardcover. Condición: new. Hardcover. From beautiful crystals with the energy to power electronic devices to amazing gemstones incorporated into religious practices across different cultures, the natural world has of thousands of different kinds of crystals and gemstones. How do these hidden treasures form deep underneath Earth'…

Hardcover. Condición: new. Hardcover. A home is a place to feel safe and the farm is full of life. But what if they became places fright and death? Travel the world, visiting real homes and farms with creepy legends and unbelievable paranormal events. Are the stories of strange figures and unexplained disturbances make-believe o…