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Más de 80 fotografías, 20 mapas y diagramas en color * En los próximos diez años, el planeta Marte entrará en un periodo de observación excepcional: se aproximará mucho a la Tierra y presentará un brillo y un diámetro aparente sobresalientes, por lo que será fácil observarlo con sencillos instrumentos astronómicos. Con el fin de que los astrónomos aficionados puedan disfrutar al máximo de la actualidad de Marte, esta guía establece de forma clara y concisa cuáles so los conocimientos actuales acerca del planeta rojo y ofrece consejos útiles para una mejor observación a lo...

Who were the earliest Americans? When, how, and from where did they enter and spread across the continent? And what is their relationship to modern Native Americans? Anthropologists develop theories to answer these questions based on the evidence they discover. Their theories—and the discoveries that prove and disprove them—are highlighted in this fascinating volume, full of awe-inspiring facts and incredible breakthroughs. Readers will feel like anthropologists and archaeologists themselves as they read about bones and artifacts, and what they reveal about the ancient cultures that roamed...

Introduces the geography, history, religion, government, economy, and culture of one of the poorest countries in the western hemisphere.

Healthy Habits is a collection of four stories featuring the Chiminis, fictitious characters that live in the forest and are as small as pine cones. In each story, one of the Chiminis has an adventure that highlights the importance of hygiene, a good diet, and exercise, and offers general health advice.