¿Cómo se cultivan los alimentos?

As they say, necessity is the mother of invention, and this book introduces readers to 14 women who invented very useful, helpful items. They include Chicago native Margaret Wilcox who invented the car heater, Indiana native Marion O'Brien Donovan who invented disposable diapers, Pennsylvania native Stephanie Kwolek who invented Kevlar, and Austria-born actress Hedy Lamar whose secret communications systems led to the creation of WiFi, Bluetooth, and GPS.

Viajaremos por el mundo, continente a continente, para conocer los animales más fascinantes que habitan nuestro planeta. Descubriremos las criaturas más feroces de la sabana africana, los bichos más exóticos de las selvas americanas, las fieras que habitan el continente asiático, los animales más misteriosos y sorprendentes del fondo marino y... ¡muchísimo más! Mi primer Atlas de Animales es un libro indispensable para consultar en casa o en la escuela y convertirte en un especialista de la fauna de nuestro planeta. ¡Un Atlas bestial!

At an early age, Steve fell in love with the possibility of the computer machine. He knew it had the power to change someone's life. Inspired to create a personal computer accessible for everyone, Steve went on to become one of the most influential inventors the world has ever met. This inspiring story of the visionary and entrepreneur features a facts and photos section at the back.

What does swimming in a pool, drinking through a straw, breathing in air, and circulating blood all have in common? They all require a form of air or water pressure! Readers will discover the variety of ways that air and water pressure make an impact on our lives and the things in them. This fact-filled, Spanish-translated nonfiction title includes real-life examples and basic experiments to aid in the development of understanding physic and scientific concepts. Readers will be introduced to and learn about Archimedes Principle, atmospheric pressure, vacuums, water density, and hydraulics...