¿Por qué celebramos el Día de Martin Luther King Jr.? (Why Do We Celebrate Martin Luther King Jr. Day?)

En esta obra, el autor ha puesto gran empeño en aportar datos inéditos sobre la vida de Arthur Nicolaier, y ha tratado de rescatar, para los profesionales de la salud y para el público en general, la figura, casi desconocida, de este médico alemán, que, a los 22 años, pasó a la historia de la medicina por descubrir el agente productor del tétanos.

If asked to define a forest, readers might say, "It has a lot of trees." But many places have a lot of trees. So, what makes a forest a forest? Readers discover that a forest is unlike any other biome on Earth. And a temperate forest is even more specific. Readers learn the many life cycles found within a forest and how the energy pyramid explains the numbers of forest plants and animals. In addition, readers learn by examining how forces usually considered destructive work to help forests survive. 32pp.

Eleven-year-old Jenny, whose family came from Russia to America to start a new life, meets the famous Russian composer on his 1891 trip to the New World and writes about it in her diary.

Convi�rtete en un ingeniero experto y construye impresionantes obras de redstone con esta gu�a oficial de Minecraft. Aqu� aprender�s a usar los componentes de redstone, a montar circuitos funcionales y a levantar ingeniosas estructuras. Con informaci�n privilegiada por parte de los expertos de Mojang, �sta es la gu�a definitiva para las obras de ingenier�a de Minecraft. ENGLISH DESCRIPTION Learn the art of redstone and become a master engineer with Minecraft: Guide to Redstone, then put theory into practice to construct intricate contraptions in Minecraft. Pick up the basics...