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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.
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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.
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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
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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.
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A veces la gente se siente... no demasiado bien: como una caca. Pero este caso es distinto. Porque nuestra protagonista no es sino... una caca.
Esta es la historia de una caca que no quiso conformarse con su suerte. Al tiempo que desarrolla habilidades asombrosas, irá averiguando cosas de sí misma y de los demás. Y descubrirá que hay una única forma de ser: el cambio.
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Sin stockDiscute el calentamiento global, su efecto sobre los casquetes polares de la Antártida y el efecto que su fusión tiene sobre el nivel del mar, a través de una historia ficticia en formato de novela gráfica sobre una expedición científica a la Antártida.
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Sin stockEn este libro, los estudiantes escuchan mientras los científicos, agencias gubernamentales y grupos de trabajo ambientales debaten y discuten el futuro de los combustibles fósiles. Los lectores descubrirán que los suministros de combustibles fósiles son limitados, las formas de conservar esta importante fuente de energía y cuáles son algunas de las fuentes de energía alternativas y más limpias.
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Los derrames de petróleo tienen un grave impacto en el medio ambiente, matando innumerables especies silvestres, destruyendo hábitats importantes y contaminando nuestras aguas. Los lectores siguen a un grupo de voluntarios mientras aprenden sobre lo que los derrames de petróleo le hacen a nuestro medio ambiente, qué medidas se pueden tomar para limpiar después de los derrames de petróleo y las formas de evitar que ocurran futuros derrames.
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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!
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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!
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¡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!
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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!
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This book gives students an in-depth look at how large telescopes work. The wonder and awe of space and the scientific instruments we use to study it both come shining through in this fascinating book. Full-color diagrams and illustrations will help students visualize how the technology of telescopes works. Students will learn about the creation of mirrors 26.2 feet wide and telescope teams that work together to create a telescope as powerful as if it had a mirror the size of Earth!
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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!
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Chemistry is often a daunting subject for students, fostering a bewilderment that sets in upon their first encounter with the Periodic Table. This book demystifies an important aspect of the subject--chemical reactions--and demonstrates exactly how fascinating and fun chemistry can be. Starting out by explaining just what a chemical reaction is--and what it isn't--the book details in accessible language the various kinds of chemical reactions that are possible. It draws upon readily comprehensible everyday examples, like rusting metal, baking bread, battery power, digestion, rotting eggs, and burning candles. The book then turns to a survey of the history of chemical research, beginning in the Ancient and Classical Worlds, progressing to the Medieval alchemists and Renaissance innovators, and ending with the leading lights of modern chemistry. Readers will be introduced to luminaries such as Antoine Lavoisier, John Dalton, Louis Pasteur, Dmitri Mendeleyev, the Curies, and Ernest Rutherford. It concludes with an inspiring examination of how current research and cutting edge developments are using chemistry and chemical reactions to save lives and insure continued life on Earth. This book amply illustrates the accessibility, relevance, and gee-whiz fun of chemical reactions.
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Because of the biological similarities between many animals and humans, scientists can learn about diseases, and find out how humans might react to medicines, cosmetics, chemicals, and other products by testing them on animals first. According to the Humane Society of the United States, more than twenty-five million animals are used in research, testing, and education each year. Readers learn about the various philosophies on animal testing, what tests are used, and how they are performed. The book presents the pros and cons of animal testing and some of the alternative methods to animal testing that scientists are developing today.