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Did you know that baby butterflies look like worms with legs? Caterpillars turn into butterflies inside a shell. Discover more about these flying insects in Butterflies, part of the Life Cycles series of EYEDISCOVER books.

Did you know that gases have no size or shape? Gases can become liquids when they get cold. Discover more interesting facts in Gases, part of the States of Matter series of EYEDISCOVER books.

Did you know that pigs are some of the smartest animals on Earth? Pigs keep themselves very clean. Discover more about these farm animals in My Pig.

The United States grew rapidly from the time of the Louisiana Purchase to the building of the Transcontinental Railroad. All of this expansion came at the expense of Native American populations that had either lived in the region for centuries or been forced there from ancestral homes in the East. Tribes memorably fought on their own and together in an doomed effort to retain the land and a lifestyle that had long sustained their families. This book outlines some of the major conflicts of the Westward Expansion, and of the treaties and were signed, and often broken, by representatives of the...

California grew by leaps and bounds between the Gold Rush and 1900. People from different backgrounds emigrated to California from across America and around the world in search of a new life. This primary source reader focuses on immigration in California from the time of the Gold Rush to the end of the nineteenth century. Primary source documents allow students to see different points of view, and help students look at the world and current issues with a historical lens. This Interactiv-eBook builds literacy and social studies content knowledge through the use of intriguing primary sources...

A biography telling the life story of Revolutionary War hero and spy Nathan Hale. Written in graphic-novel format.

Este libro –cuenta William H. Hodgson en su introducción a «Los piratas fantasmas»– puede ser considerado el último de un grupo de tres. El primero se publicó bajo el título de «Los botes del “Glen Carrig”»; el segundo, como «La casa en el confín de la Tierra»; por fin, este tercero, completa lo que, quizá, pueda ser considerado una trilogía; pues, aun cuando los tres difieren mucho en los contenidos, todos ellos coinciden en una determinada forma de tratar unos conceptos elementales. Con este libro, el autor cree que cierra una puerta, en cuanto a lo que a él concierne, ...