Líderes de la Comunidad

What has a head, two tails, and shoots across the sky? A comet. Coming from the far edges of the solar system, most comets travel around the Sun, while meteors appear as flashing streaks of light in the night sky. Explore these amazing celestial wonders as they zip through space! This book looks at the difference between comets and meteors and their effects on Earth. The physical characteristics of each are identified in detail. This book won’t come crashing down! It’s filled with fun facts that give additional information on this exciting science topic. This book allows students to use...

Parte de la exitosa serie Little People, BIG DREAMS, Marie Curie cuenta la inspiradora historia de uno de los científicos más famosos del mundo / Part of the bestselling Little People, BIG DREAMS series, Marie Curie tells the inspiring story of one of the world's most famous scientists.

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.

Animales al natural es un recorrido por un zoológico -uno portátil, además- en el que podemos observar animales a escala real. Las 21 fotografías que lo forman capturan y permiten examinar los detalles más sorprendentes de la fisionomía animal, desde la textura de la lengua de un tigre hasta las pestañas de un camello. el visitante de este libro podrá encontrar señalizaciones, ilustradas de manera creativa y lúdica, que contienen información básica de cada animal, como nombre científico, peso y dimensiones, además de otros datos menos conocidos y muy curiosos.