Nuevo avance. Con CD Audio. Per i Licei e gli Ist. Magistrali

¿Qué tienen que ver el 2012, el calendario maya, la geometría sagrada y el segundo advenimiento de Cristo? La respuesta puede estar en unos bellos y misteriosos diseños que desde hace más de treinta años aparecen en los campos de cereales de varios países. Se conocen como crop circles o círculos en los cultivos. Aunque en su mayor parte se manifiestan al sur de Inglaterra, muy cerca del templo de Stonehenge, existen registros de ellos en al menos cincuenta países de los cinco continentes. ¿Quién y cómo los hace? Nadie lo sabe a ciencia cierta, los autores de los crop circles...

Although John Pentecost left the place and married Katherine, he feels very attached to his hometown in Lancashire, a beautiful place that harbors uncomfortable memories. But when John's grandfather dies, John will be forced to return home, where he will have to face decisions and sacrifices for the clan.

The Spanish-language edition of an informative, inspirational picture book biography about twins Juli n and Joaquin Castro, who rose from poverty to become leaders for positive change in America. The story of political powerhouse twins Juli n and Joaquin Castro began in the small room that they shared with their grandmother Victoriana in San Antonio, Texas. Victoriana crossed the border from Mexico into Texas as a six-year-old orphan, marking the start of the family's American journey. Her daughter Rosie, Juli n and Joaquin's mom, was an activist who helped the barrio through local...

What is matter and where can it be found? Everything in the world is made of matter, whether it is a solid, a liquid, or a gas. Important ideas about matter such as volume, mass, and how matter changes state are conveyed through a series of easy-to-do experiments.