Agujeros negros (Black Holes)

For many years, people believed there were nine planets that orbited the sun. Now we say there are eight. What happened to the ninth planet, Pluto? What are the different planets like? What exactly makes a planet a planet? These are the many intriguing questions answered with this high-interest book, crafted to be accessible for readers of all levels. Young astronomers will be especially fascinated by the stunning photographs and the "Make the Grade" fact boxes.

Descubre a 25 supercient�ficas que cambiaron el mundo y demostraron que �las chicas son de ciencias! #ChicasDeCiencias �Sabes cu�ntos descubrimientos cient�ficos debemos a las mujeres? Aunque en los libros de historia parezca que las ciencias son cosa de hombres, de eso nada: desde Agnodice, la primera m�dica conocida de la historia, hasta Rosalind Franklin, la qu�mica que descubri� la estructura del ADN, pasando por Vera Rubin, la astr�noma que vio lo que nadie ve�a, las mujeres han sido pioneras en ciencias desde el inicio de los tiempos. Y aun as�, �podr�as...

en50MINUTOS.es te ofrece un análisis rápido y conciso de La clave del éxito de Malcolm Gladwell, su obra más exitosa debido a la originalidad de los conceptos presentados y a su agradable estilo. Si quieres descubrir en un tiempo récord cuál es el punto clave para que se originen las epidemias sociales, ¡en50Minutos.es te lo pone fácil! ¡Comienza hoy mismo a ampliar tus horizontes con en50MINUTOS.es! En tan solo 50 minutos, este libro te aportará: • Los trucos para encontrar la clave del éxito, que Malcolm Gladwell nos explica a través de ejemplos sacados de hechos cotidianos de ...

Set in the 1950s in the Bronx, this is the story of a girl with a dream. Emmy award-winning actress and writer Sonia Manzano plunges us into the daily lives of a Latino family that is loving--and troubled. She is a child living amidst the squalor of a boisterous home that is filled with noisy relatives and neighbors. Each day she is glued to the TV screen that blots out the painful realities of her existence and also illuminates the possibilities that lie ahead. But--click!--when the TV goes off, Sonia is taken back to real-life--the cramped, colorful world of her neighborhood and an...

The novel opens on a cold, gray landscape. It is the beginning of December. Oak fires are burning in the stately flickering hearths of Nideck Point. It is Yuletide. For Reuben Golding, now infused with the gift of the wolf and under the loving tutelage of the Morphenkinder, this Christmas promises to be like no other...