Exploremos los minerales de la Tierra (Exploring Earth's Minerals)

When winter hits, many people in colder climates spend most of their time indoors. But what do wild animals do? Some animals spend winters hibernating. Beginning readers will learn what hibernation is, why some animals hibernate and others don't, and how hibernating animals prepare for their long sleep. Full-color photographs grab readers' attention and allow them to draw connections to the narrative. Readers will love learning about this mysterious, restful time in some animals' lives.

The rock cycle has been taking place for millions of years. However, geologists have only known about this phenomenon for about 300 years. Young terrestrial explorers are introduced to different types of rocks, where in the cycle these rocks fit, and where in Earth's layers each step takes place. Fact boxes provide readers with fun additional information. A diagram helps readers make sense of the new information they're learning.

De una u otra forma, el agua se encuentra en casi todos los rincones del planeta. Además de constituir el hábitat de miles de especies y formar parte de nuestro organismo, su presencia en grandes antidades nos ayuda a transportarnos y nos brinda espectáculos tan formidables como aterradores. Así, cada gota es muestra innegable, como se lee en este libro, de que la vida florece donde hay agua.\"

En El fascinante mundo de... las serpientes aprenderás que algunas especies son capaces de tragarse huevos enteros de gran tamaño. Verás cómo se enroscan las serpientes constrictoras alrededor de sus presas. Comprobarás que algunas especies detectan a los animales de sangre caliente. Descubrirás que no todas las serpienes son venenosas... y muchas más cosas sobre su fascinante mundo.

A little girl, found at sea, is taken to a strange country where no one knows her name, her language, or her people.

The plot of The Empty Region takes the reader from the military camps of holy warriors in Pakistan, to the security corridors of the CIA and the FBI. It’s a fascinating puzzle inhabited by historical characters, including Osama bin Laden and George W. Bush, as well as officials aware of the tragedy´s secrets. Szichman leads us along the terminals where the air pirates of al-Qaida consummated their tragic ritual, makes us travel on the airplanes, turned into guided missiles, and recreates the 102 minutes when the burning towers of the World Trade Center became hell on earth. Although...