Experimentos para todas las edades

What if a coyote and dingo had a fight? Who do you think would win? Este libro de no ficción compara y contrasta dos animales feroces: ¡un coyote y un dingo! Los lectores aprenderán sobre la anatomía, el comportamiento y otras características de cada animal. ¡Luego podrán comparar y contrastar a ambos para finalmente descubrir al ganador de la pelea!Esta serie de no ficción está llena de datos, fotos e ilustraciones realistas, e incluye una gran variedad de mamíferos, criaturas marinas, insectos y dinosaurios para satisfacer a todo tipo de fanáticos de los animales.This nonfiction...

Una verdadera clase de paleontología para niños (y para mayores). Asesorada por verdaderos doctos en la materia, Aliki nos adentra en el fabuloso mundo de estos gigantescos animales prehistóricos, haciéndonos ver las diferencias entre varias especies, y l

People today refer to the Midwestern and prairie states as flyover country. During the Civil War, crossing those areas was the biggest obstacle in uniting the East and West Coasts of our divided nation. An act of Congress in 1862 authorized the Central Pacific and the Union Pacific railroad companies to build a railroad that would link the coasts. Seven years later, on May 10, 1869, an overwhelmingly immigrant labor force completed the task when a rail line was join in Promontory, Utah. The states had become united at last.

In 1991, preparation for the construction of a new federal office building led to a startling discovery: a skeleton. Further excavation exposed the bones of 420 men, women, and children. This area of New York had been a burial ground set aside for both free and enslaved Africans during the 1600s and 1700s. It’s thought to be one of the most important archaeological discoveries of the 20th century. This noteworthy book—which includes sidebars, fact boxes, a timeline, and maps—fills in the gaps of history books, exposing much about what life was like in colonial New York for Africans.