Submarinos de La Armada de Ee.Uu./U.S. Navy Submarines

"Simple text and color photographs describe the units and tools used to measure time--in both English and Spanish"--

Until just over 150 years ago, northern Mexico extended thousands of kilometers farther than its current border with the United States. Many different indigenous groups flourished in that region before the Conquistadors arrived. What we know about their lives and customs is the result of archeological discoveries and the chronicles of the first Spanish priests and soldiers that had contact with them.

En este libro descubrirás: -Cómo elaborar y utilizar tu propio cuaderno para anotar tus hallazgos campestres. -Buscar el rastro que los animales dejan tras de sí, como huellas, restos de comida, madrigueras... -Hacer tú mismo comederos para animales en el jardín o en la ventana. -Por qué es tan importante reciclar aquella basura que pueda ser peligrosa para el medio ambiente. -Cómo cultivar tu propia cosecha en casa utilizando frutos silvestres, piñas o semillas. -Escuchar, oler y mirar con atención la naturaleza cada vez que damos un paseo por el campo.

An elementary introduction to the workings of the human body, the skeleton, skin, circulation, and nervous system.

An introduction to ostriches, including their size, diet, and everyday behavior and highlighting differences between those in the wild and those living in zoos.