El fantasma negro

What is work? You may think work is doing chores or going to a job, but you do work every time you move something from one place to another. With experiments that demonstrate these fundamental concepts, discover how you work, and how simple machines make doing work easier.

La filosofía como nunca te la han contado. Descúbrela y sacia tu hambre de conocimiento. ¿Quién soy? ¿Qué hago aquí? ¿Qué es la realidad? ¿Soy libre? ¿Cuál es el sentido de la vida? Y, si no tiene sentido, ¿vale la pena vivirla? ¿Cómo puedo comprender este mundo loco? Y, por cierto... ¿qué venía a buscar a la nevera? Si las grandes preguntas te asaltan en el momento menos pensado, está claro que tienes hambre de conocimiento. En este original recorrido por la historia del pensamiento descubrirás que la filosofía está en todas partes... ¡Incluso dentro y fuera de tu...

Hurricanes takes you inside one of nature's most powerful events! Warm water and wind can quickly spin into a deadly storm. Dramatic photos show the damage huge hurricanes leave behind, and safety tips help you protect yourself from danger. Spanish Edition

Do you have what it takes to be an athlete? In this Spanish-translated nonfiction book, readers learn about the hard work, athletic training, and dedication that athletes from all sports and levels go through to be healthy and successful. Readers are familiarized with concepts like coordination, endurance, and athletic motivation. Along with stunning photos and charts and riveting facts, this nonfiction title includes an interview with a real-life Olympic athlete and an accessible glossary, index, and list of useful sources. This 6-Pack includes six copies of this title and a lesson plan.