¿Lo pensaste alguna vez?

What has a head, two tails, and shoots across the sky? A comet. Coming from the far edges of the solar system, most comets travel around the Sun, while meteors appear as flashing streaks of light in the night sky. Explore these amazing celestial wonders as they zip through space! This book looks at the difference between comets and meteors and their effects on Earth. The physical characteristics of each are identified in detail. This book won’t come crashing down! It’s filled with fun facts that give additional information on this exciting science topic. This book allows students to use...

Es mérito importante de este libro el resituar para el profesor, el alumno o el aficionado a la filosofía tanto las raíces como los conceptos básicos de esta materia, es decir, las razones y los elementos que dan cuerpo a la actividad filosófica, partiendo del aserto capital de que «la filosofía tiene su origen en la experiencia de la vida y busca pensarla». Así, a lo largo de todo el volumen es clara la voluntad de plantear la filosofía como experiencia y no como conocimiento. Françoise Raffin acierta a proponer en esta " Pequeña introducción a la filosofía " un estímulo para...

"Some things are so huge or so old that it's hard to wrap your mind around them. But what if we took these big, hard-to-imagine objects and events and compared them to things we can see, feel and touch? Instantly, we'd see our world in a whole new way." So begins this endlessly intriguing guide to better understanding all those really big ideas and numbers children come across on a regular basis. Author David J. Smith has found clever devices to scale down everything from time lines (the history of Earth compressed into one year), to quantities (all the wealth in the world divided into one...

Answers such questions as "Qué son los perros?, Qué come mi perro?, Qué mas necesita mi perro?, Qué puedo hacer por mi perro?, Qué puede hacer mi perro?"