Bitacora 4

Defines pulleys, explains their functions, and suggests simple experiments to demonstrate how they work.

Comprar una ternera recién nacida para seguir su vida y contarla. La vida de una vaca es la historia de Juan Pablo y La Negra, un animal que el autor compra en efectivo para meterse de lleno en la industria. En el camino se asocia a un productor ganadero, va a remates y frigoríficos, conoce al Rey de la Carne, al peluquero de los toros de exhibición de Mel Gibson y le explican en detalle el mercado de criar, matar y comer animales: toda la cadena de producción de Argentina, un país enloquecido por el asado. Esta es la historia de La Negra, pero también la de millones que, como ella,...

From war and death to school and gender equality, the Sociedad series discusses many serious issues in a way that can be easily understood by children. Although many of the situations and examples are specific to Mexico, these books can be applied to a general readership, particularly one of Hispanic origin. Reflecting on modern sciences, particularly biotechnology—from its limitations to its advances—this perceptive study answers many questions concerning cloning and genetically modified organisms, such as Why do scientists work in these arenas? What are the benefits of this technology?...

Michelangelo, the world-renowned artist who painted the Sistine Chapel's frescoes and sculpted Moses, David, and the Pieta, is the subject of this beautifully written historical novel. Text copyright 2004 Lectorum Publications, Inc.