La rana que no sabía que estaba hervida...

First readers will begin to learn and identify shapes, which are the building blocks for learning math.

Young children are natural problem-solvers and always looking for answers, especially when it involves interesting animals. This Spanish-language edition of Scaly Swimmers provides young curious readers with striking visual clues and simply written hints. Using the photos and text, readers rely on visual literacy skills, reading, and reasoning as they solve the animal mystery. Clearly written facts give readers a deeper understanding of how the animal lives. Additional text features, including a glossary and an index, help students locate information and learn new words.

"Some things are so huge or so old that it's hard to wrap your mind around them. But what if we took these big, hard-to-imagine objects and events and compared them to things we can see, feel and touch? Instantly, we'd see our world in a whole new way." So begins this endlessly intriguing guide to better understanding all those really big ideas and numbers children come across on a regular basis. Author David J. Smith has found clever devices to scale down everything from time lines (the history of Earth compressed into one year), to quantities (all the wealth in the world divided into one...

La religión ha acompañado la evolución del hombre desde las etapas más remotas de la Prehistoria. Sin embargo, existen grandes diferencias de concepción y de ritual entre unas y otras (religiones teístas y ateas, individuales y colectivas, oscurantistas y lógicas). Algunas son patrimonio de un pueblo o de una etnia. La religión ha utilizado el poder político y éste, a su vez, se ha valido de ella. En este primer volumen se analiza el origen y el desarrollo de las grandes religiones desde los orígenes del hombre hasta el fin del imperio romano, en el contexto de la evolución...