¿Por qué hibernan los animales? (Why Animals Hibernate)

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.

In order for any democracy to function well, understanding how and when to compromise is a necessity. This book introduces students to how compromise makes governing possible. Using examples of how compromise works in their own lives, students will gain a better understanding of how compromise work on a larger level. Conversely, readers will also learn that compromise may be the wrong course of action in some situations and that some issues are of such critical importance or high moral worth that standing firm is appropriate.

Sesenta autores, desde catedráticos de universidad hasta estudiantes de Secundaria y Bachillerato, nos presentan los cuarenta desafíos que la Real Sociedad Matemática Española propuso con motivo de su centenario.Son cuarenta estimulantes retos que avivan el ingenio. Enfrentándose a ellos, el lector se sentirá un auténtico investigador matemático.Pero no hay que asustarse. No es necesario saber muchas matemáticas. La herramienta esencial para resolver los desafíos es pensar ordenadamente.

Sally is an incredible singer but she'd rather join a nudist colony than sing in public. That is until she ventures to New York where a wild summer of love and loss changes her forever. Sally returns home to London, but as she's about to embark on her new life, a beautiful man turns up on Sally's doorstep.

Escribir contraportadas de libros (especialmente las de uno mismo) es muy dif�cil. A continuaci�n lo intentar�: este libro es sobre el miedo. Sobre c�mo funciona, c�mo se adue�a de nosotros y c�mo nos persigue desde la infancia. Si antes les tem�amos a los monstruos debajo de la cama, hoy tambi�n. Pero no todo es tan malo. Todos sentimos miedo sin importar de d�nde somos, cu�ntos a�os tenemos, o si nos gusta o no el chocolate, Yo, por ejemplo, casi me muero de ansiedad (que es miedo en su m�xima potencia) y sobreviv�. No s�lo sobreviv� sino que aprend� que lo ...