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In 1878 in Denison, Texas, a man named John Martin looked up into the sky and saw something he could not explain. Americans have been hooked on the possibility of beings from space visiting Earth ever since. A sense of wonder, and reality, are brought to some popular legends of alien encounters and sightings in this volume. The final chapter explores how these legends have become even more popular thanks to movies, television, and literature. -
Imagine traveling at half the speed of a jet plane without ever leaving the ground! Students will discover the technology that makes such speeds possible, from special tracks and safety precautions to aerodynamically designed trains. What are the limits to the speed of trains? What imposes those limits? Students also will read about the future of passenger train travel, from flying trains to trains that use huge magnets to levitate inches or centimeters off the track. Some trains safely reach speeds of more than 200 mph! -
The Internet brought about a total revolution in the world of information. Today, anyone with an Internet connection can access a wealth of information online. As our access to data increases, copyright laws struggle to keep up. This book examines how copyright law has been applied to online content, the emerging open source movement, fair use, proper citation practice, and the ethics of using and citing online information. It is an invaluable resource for today's students. -
The increasing power of mobile communications devices has reached the point where they now act as a pocket-sized computer. With this much power, a wide range of downloadable applications, and always-available Internet access, the ability to use todays smartphones for productivity and schoolwork has huge potential. This book examines the uses, applications, and relative strengths and weaknesses among these devices. It also reveals how mobile devices can be used to find information related to communication, research, school work, and even fun and games. The reader will discover the latest techniques for gathering information on-the-go, in the form of digital photos, text, audio, and video, using mobile devices. They will also learn how to use those same mobile devices to organize, retrieve, and relay the information they have gathered to friends, family, study partners, and teachers. The book also includes the latest guidelines for proper digital and cell phone etiquette and security, Myths and Facts, and 1 Great Questions to Ask an IT Specialist -
What is your carbon footprint? Readers can find out inside this book. Energy comes from many different sources, but some of them are quickly depleting. Readers explore the different ways to replace fossil fuels, such as solar energy and hydropower. They even discover small steps they can take to make themselves more energy efficient, such as walking or riding a bike to school. -
Explica qué hace que un edificio alto sea un rascacielos, discute el diseño, construcción y estructura de los rascacielos, y describe rascacielos prominentes en Nueva York, China, Malasia y otros lugares. -
Readers learn about real-life case studies involving stem cell research, the sources of stem cells, ethical issues surrounding the use of stem cells, and stem cells' promising possibilities for medical use in bone marrow transplants, treating leukemia, and rebuilding injured organs. Legal issues and rulings around the world are also examined. The volume includes sidebars that provide expert viewpoints on the stem cell research debate, as well as fact boxes and summary boxes that highlight the key points in each chapter. -
This book will give students an understanding of the history of flight right up to the technology and scientific discoveries that allow us to fly planes as large as todays super jumbo jets. How are airplanes designed so they can operate safely? What is the future of flight? All of these questions and more will be answered as students take a look at super jumbo jets, inside and out! -
Este libro les dará a los estudiantes una comprensión de la historia del vuelo hasta la tecnología y los descubrimientos científicos que nos permiten volar aviones tan grandes como los superjumbo jets actuales. ¿Cómo se diseñan los aviones para que puedan operar de manera segura? ¿Cuál es el futuro del vuelo? ¡Todas estas preguntas y más serán respondidas a medida que los estudiantes echen un vistazo a los superjumbo jets, por dentro y por fuera! -
Este libro ofrece a los estudiantes una mirada profunda sobre cómo funcionan los telescopios grandes. La maravilla y el asombro del espacio y los instrumentos científicos que usamos para estudiarlo brillan en este libro fascinante. Los diagramas e ilustraciones a todo color ayudarán a los estudiantes a visualizar cómo funciona la tecnología de los telescopios. ¡Los estudiantes aprenderán sobre la creación de espejos de 8 metros de ancho y equipos de telescopios que trabajan juntos para crear un telescopio tan poderoso como si tuviera un espejo del tamaño de la Tierra! -
Discusses energy sources, including their history, nuclear power, renewable energy resources, the effects of the search for resources on the world, and possible future developments. -
¡Imagínese viajar a la mitad de la velocidad de un avión sin abandonar el suelo! Los estudiantes descubrirán la tecnología que hace posible tales velocidades, desde pistas especiales y precauciones de seguridad hasta trenes diseñados aerodinámicamente. ¿Cuáles son los límites de la velocidad de los trenes? ¿Qué impone esos límites? Los estudiantes también leerán sobre el futuro del viaje en tren de pasajeros, desde trenes voladores hasta trenes que usan imanes enormes para levitar pulgadas o centímetros de la vía. ¡Algunos trenes alcanzan con seguridad velocidades de más de 200 mph! -
Presents information on what a tsunami is, including major disasters, the relationship between volcanoes and earthquakes, and what early warning systems scientists are devloping. -
Introduces nuclear power and describes its history, how it is transformed to generate electricity, and the future of the alternative energy source
