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 sun is responsible for all life on Earth, but what exactly is it? Our star is an amazing force that can be as dangerous as it is important. From solar flares to the threat of blowing up altogether, the sun is one of the most interesting things in our solar system. Readers take a trip to the sun to see how it works and exactly what it is made of. They’ll learn about the life cycle of a star and see just how long we have until we have to find a new planet to call home. Don’t worry, they’ll be happy to learn that (hopefully) we have millions of years left!

Describes the physical characteristics, habitats, life cycle, and behavior of different kinds of reptiles, including alligators, turtles, snakes, and lizards.

Getting bored is impossible with this book in your hands: it is the definitive game book. It contains more than 100 games with which to challenge the neurons of the smartest children, from naval battles where strategy is everything to sudoku puzzles or math challenges, through memory games and minesweepers ... among many others.

La familia no puede reducirse a un "tema", una "cuestión", o una "moda". Influye en todas las realidades humanas primarias como el trabajo, educación, sanidad, alimentación, sexo, etc. Y es transversal a multitud de aspectos de la vivencia humana: las religiones, las ciencias, la política, la economía, la sociedad... Por todo ello, se afirma en verdad que la familia es la célula básica de la sociedad. Pero, como ha escrito el Papa Francisco, "la familia atraviesa una crisis cultural profunda" y el matrimonio "tiende a ser visto como una mera forma de gratificación afectiva que puede...