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Summary and Analysis of The Immortal Life of Henrietta Lacks: Based on the Book by Rebecca Skloot
by Worth BooksSo much to read, so little time? This brief overview of The Immortal Life of Henrietta Lacks tells you what you need to know—before or after you read the original book. Crafted and edited with care, Worth Books set the standard for quality and gives you the tools you need to be a well-informed reader. This short summary and analysis of The Immortal Life of Henrietta Lacks by Rebecca Skloot includes: Historical contextPart-by-part summaryContext and analysisDetailed timeline of key eventsCast of charactersImportant quotesFascinating triviaSupporting material to enhance your understanding of the original work About The Immortal Life of Henrietta Lacks by Rebecca Skloot: For decades, scientists have been using “HeLa” cells in biological research, from the polio vaccine and the nature of cancer to studying how human cells behave in outer space. This famous cell line began as a sample of cells taken from a poor African American mother of five named Henrietta Lacks. Henrietta died of cervical cancer in 1951 without before ever knowing that medical professionals from Johns Hopkins had taken these cells without her consent. When her family finds out that Henrietta’s cells are being bought and sold in labs around the world, they unwittingly find themselves at the intersection of a debate on science, race, and medical ethics. In her New York Times #1 bestseller, science journalist Rebecca Skloot tells the story of the woman behind the cells and her family’s struggle with the medical institutions that failed to acknowledge the human cost of scientific advancement. The summary and analysis in this ebook are intended to complement your reading experience and bring you closer to a great work of nonfiction.
Summary and Analysis of The Lost City of the Monkey God: Based on the Book by Douglas Preston (Smart Summaries)
by Worth BooksSo much to read, so little time? This brief overview of The Lost City of the Monkey God tells you what you need to know—before or after you read Douglas Preston&’s book. Crafted and edited with care, Worth Books set the standard for quality and give you the tools you need to be a well-informed reader. This short summary and analysis of The Lost City of the Monkey God includes: Historical contextChapter-by-chapter summariesProfiles of the main charactersDetailed timeline of key eventsImportant quotesFascinating triviaGlossary of termsSupporting material to enhance your understanding of the original workAbout The Lost City of the Monkey God by Douglas Preston: Douglas Preston&’s The Lost City of the Monkey God is a gripping account of the search for a civilization lost in the impenetrable jungles of Central America. For centuries, legends of the White City—the City of the Monkey God—have infused Central American culture and fired the imaginations of explorers and adventurers worldwide. The conquistadores heard of this marvel, but were never able to penetrate the jungle to find it. Author and journalist Douglas Preston accompanies a team of filmmakers and archaeologists into the one of the deadliest jungles on the planet to rediscover a truly lost world. The summary and analysis in this ebook are intended to complement your reading experience and bring you closer to a great work of nonfiction.
Summary and Analysis of The Omnivore's Dilemma: Based on the Book by Michael Pollan (Smart Summaries)
by Worth BooksSo much to read, so little time? This brief overview of The Omnivore&’s Dilemma tells you what you need to know—before or after you read Michael Pollan&’s book. Crafted and edited with care, Worth Books set the standard for quality and give you the tools you need to be a well-informed reader. This short summary and analysis of The Omnivore&’s Dilemma includes: Historical contextChapter-by-chapter summariesProfiles of the main charactersDetailed timeline of eventsImportant quotesFascinating triviaGlossary of termsSupporting material to enhance your understanding of the original workAbout The Omnivore&’s Dilemma: A Natural History of Four Meals by Michael Pollan: In the perennial bestseller The Omnivore&’s Dilemma, acclaimed journalist Michael Pollan not only reports back from the frontlines of America&’s dysfunctional food industry, but gets down and dirty with the scrappy farmers and foragers who have decided to &“opt out&” of the industrial food chain. Informative, entertaining, and often alarming, The Omnivore&’s Dilemma examines dietary trends, the origins of what we eat, and the impact of our food choices on the environment and our health, and sheds desperately needed light on the saying &“you are what you eat.&” The summary and analysis in this ebook are intended to complement your reading experience and bring you closer to a great work of nonfiction.
Summary and Analysis of Rise of the Rocket Girls: Based on the Book by Nathalia Holt
by Worth BooksSo much to read, so little time? This brief overview of Rise of the Rocket Girls tells you what you need to know—before or after you read Nathalia Holt’s book. Crafted and edited with care, Worth Books set the standard for quality and give you the tools you need to be a well-informed reader. This short summary and analysis of Rise of the Rocket Girls includes: Historical contextChapter-by-chapter overviewsProfiles of the main charactersDetailed timeline of key eventsImportant quotesFascinating triviaGlossary of termsSupporting material to enhance your understanding of the original work About Rise of the Rocket Girls: The Women Who Propelled Us, from Missiles to the Moon to Mars by Nathalia Holt: When the Jet Propulsion Laboratory first began researching rocket science and the possibilities within space exploration in the middle of the twentieth century, they hired a hyper intelligent group of female mathematicians to work with their staff of engineers. In Rise of the Rocket Girls: The Women Who Propelled Us, from Missiles to the Moon to Mars, Nathalia Holt examines four decades of the JPL’s major accomplishments from interviews and research of these groundbreaking women who were recruited to be “human computers,” Including, from this team of unsung heroes, Barbara Paulson, Helen Ling, Sue Finley, and Sylvia Lundy. As the JPL’s projects evolved from developing missiles and satellites to executing moon landings and planetary exploration projects, the women’s roles grew too, becoming the team responsible for launching America into Space—and they did it all while balancing marriage and children, too. The summary and analysis in this ebook are intended to complement your reading experience and bring you closer to a great work of nonfiction.
Summary and Analysis of Sapiens: Based on the Book by Yuval Noah Harari
by Worth BooksSo much to read, so little time? This brief overview of Sapiens: A Brief History of Humankind tells you what you need to know—before or after you read Yuval Noah Harari’s book. Crafted and edited with care, Worth Books set the standard for quality and give you the tools you need to be a well-informed reader. This short summary and analysis of Sapiens includes: Historical contextChapter-by-chapter overviewsCharacter profilesDetailed timeline of key eventsImportant quotesFascinating triviaGlossary of termsSupporting material to enhance your understanding of the original workAbout Sapiens: A Brief History of Humankind by Yuval Noah Harari: Sapiens is a wide-ranging account of human history that upends the conventional wisdom about our species with novel, even startling, theories about how we developed and where we’re headed. The bestselling book Sapiens takes the reader from humanity’s remote origins in East Africa; through its spread to societies and empires around the world; and finally to the present, when Sapiens as we know them may be about to disappear. Throughout this journey, Homo Deus author Yuval Noah Harari offers new insights into the importance of language, imagination, and even ignorance in the development of human history. The summary and analysis in this ebook are intended to complement your reading experience and bring you closer to a great work of nonfiction.
Summary and Analysis of The Sixth Extinction: Based on the Book by Elizabeth Kolbert (Smart Summaries)
by Worth BooksSo much to read, so little time? This brief overview of The Sixth Extinction tells you what you need to know—before or after you read Elizabeth Kolbert&’s book. Crafted and edited with care, Worth Books set the standard for quality and give you the tools you need to be a well-informed reader. This short summary and analysis of The Sixth Extinction: An Unnatural History by Elizabeth Kolbert includes: Historical contextChapter-by-chapter overviewsDetailed timeline of key eventsImportant quotesFascinating triviaGlossary of termsSupporting material to enhance your understanding of the original work About The Sixth Extinction by Elizabeth Kolbert: Our planet has endured five events of mass extinction, from centuries of catastrophic heating and cooling to the asteroid that fell to earth and ended the Cretaceous Period. We are currently facing the sixth extinction, and this time the human species is to blame. Elizabeth Kolbert travels the world and meets with scientists who are grappling with the ecological outcomes of human activity. Her Pulitzer Prize–winning modern science classic tells the stories of thirteen different species that have already disappeared or are on the brink of extinction as a result of human activity. A captivating blend of research and historical anecdotes enlightens readers about the unintentional consequences of our behaviors, from climate change and global warming to invasive species and overexploitation. The summary and analysis in this ebook are intended to complement your reading experience and bring you closer to a great work of nonfiction.
Summary and Analysis of Stiff: Based on the Book by Mary Roach
by Worth BooksSo much to read, so little time? This brief overview of Stiff tells you what you need to know—before or after you read Mary Roach’s book. Crafted and edited with care, Worth Books set the standard for quality and give you the tools you need to be a well-informed reader. This short summary and analysis of Stiff: The Curious Lives of Human Cadavers by Mary Roach includes: Historical contextChapter-by-chapter summariesProfiles of the characters and placesImportant quotesFascinating triviaGlossary of termsSupporting material to enhance your understanding of the original work About Stiff: The Curious Lives of Human Cadavers by Mary Roach: Acclaimed journalist Mary Roach’s bestselling book Stiff offers an inside look through the through the weird world of human cadavers. This globe-spanning story is deeply informative, surprisingly funny, and occasionally disgusting. These “superheroes,” as Roach refers to them, brave high-speed car crashes, gunshots, decomposition in the sun, and other indignities all in the name of advancing science and making life better for the living. The summary and analysis in this ebook are intended to complement your reading experience and bring you closer to a great work of nonfiction.
A Summary of Scientific Method (SpringerBriefs in Philosophy)
by Peter KossoA Summary of Scientific Method is a brief description of what makes science scientific. It is written in a direct, clear style that is accessible and informative for scientists and science students. It is intended to help science teachers explain how science works, highlighting strengths without ignoring limitations, and to help scientists articulate the process and standards of their work. The book demonstrates that there are several important requirements for being scientific, and the most fundamental of these is maintaining an extensive, interconnected, coherent network of ideas. Some components in the network are empirical, others are theoretical, and they support each other. Clarifying the structure of this web of knowledge explains the role of the commonly cited aspects of scientific method, things like hypotheses, theories, testing, evidence, and the like. A Summary of Scientific Method provides a clear, intuitive, and accurate model of scientific method.
Summary of the Workshop to Identify Gaps and Possible Directions for NASA's Meteoroid and Orbital Debris Programs
by The National Academy of SciencesA Summary of the Workshop to Identify the Gaps and Possible Directions for NASA's Meteoroid and Orbital Debris Programssummarizes the two-day workshop held on March 9-10, 2011, where various stakeholders presented diverse perspectives on matters concerning NASA Micrometeoroid and Orbital Debris (MMOD) programs, NASA mission operators, the role and relationships of NASA MMOD programs to other federal agencies, MMOD and the commercial industry, and orbital debris retrieval and removal. The report assesses NASA's existing efforts, policies, and organizations with regard to orbital debris and micrometeoroids by creating advisory dialogue on potential opportunities for program enhancement and maintenance practices.
Summary Of A Workshop On U.s. Natural Gas Demand, Supply, And Technology: Looking Toward The Future
by Committee on U.S. Natural Gas Demand Supply Projections: A WorkshopThe workshop examined the following three questions: (1) What projections have been made by government agencies for the U. S. supply of and demand for natural gas over the next 10 to 20 years? (2) Where are the current natural gas reserves and resources? (3) By what means and by how much can future reserves, resources, and production be increased?
Summer Discovery
by Drew CarsonWhile building a fort near their homes by Oregon's Umpqua River, two nine-year-olds make a discovery that involves their neighbors in trying to stop a bridge from being built on an important archeological site.
Summer for the Gods: The Scopes Trial and America's Continuing Debate Over Science and Religion
by Edward LarsonIn the summer of 1925, the sleepy hamlet of Dayton, Tennessee, became the setting for one of the 20th century's most contentious dramas: the Scopes trial that pit William Jennings Bryan and the anti-Darwinists against a teacher named John Scopes into a famous debate over science, religion, and their place in public education That trial marked the start of a battle that continues to this day-in Dover, Pennsylvania, Kansas, Cobb County, Georgia, and many other cities and states throughout the country. Edward Larson's classic, Summer for the Gods, is the single most authoritative account of a pivotal event whose combatants remain at odds in school districts and courtrooms. For this edition, Larson has added a new preface that assesses the state of the battle between creationism and evolution, and points the way to how it might potentially be resolved.<P><P> Pulitzer Prize Winner
Summer for the Gods: The Scopes Trial and America's Continuing Debate Over Science and Religion
by Edward J. LarsonThe Pulitzer Prize-winning history of the Scopes Trial and the battle over evolution and creation in America's schools.In the summer of 1925, the sleepy hamlet of Dayton, Tennessee, became the setting for one of the twentieth century's most contentious courtroom dramas, pitting William Jennings Bryan and the anti-Darwinists against a teacher named John Scopes, represented by Clarence Darrow and the ACLU, in a famous debate over science, religion, and their place in public education. That trial marked the start of a battle that continues to this day in cities and states throughout the country. Edward Larson's classic Summer for the Gods -- winner of the Pulitzer Prize in History -- is the single most authoritative account of this pivotal event. An afterword assesses the state of the battle between creationism and evolution, and points the way to how it might potentially be resolved.
A Summer of Birds: John James Audubon at Oakley House (The Hill Collection: Holdings of the LSU Libraries)
by Danny HeitmanAs the summer of 1821 began, John James Audubon's ambition to create a comprehensive pictorial record of American birds was still largely a dream. Then, out of economic necessity, Audubon came to Oakley Plantation, a sprawling estate in Louisiana's West Feliciana Parish. Teeming with an abundance of birds, the woods of Oakley galvanized Audubon's sense of possibility for one of the most audacious undertakings in the annals of art. In A Summer of Birds, journalist and essayist Danny Heitman sorts through the facts and romance of Audubon's summer at Oakley, a season that clearly shaped the destiny of the world's most famous bird artist. Heitman draws from a rich variety of sources -- including Audubon's own extensive journals, more recent Audubon scholarship, and Robert Penn Warren's poetry -- to create a stimulating excursion across time, linking the historical man Audubon to the present-day civic and cultural icon. He considers the financial straits that led to Audubon's employment at Oakley as a private tutor to fifteen-year-old Eliza Pirrie, Audubon's family history, his flamboyance as a master of self-invention, his naturalist and artistic techniques, and the possible reasons for his dismissal. Illustrations include photographs of Oakley House -- now a state historic site -- Audubon's paintings from his Oakley period, and portraits of the Pirrie family members. A favorable combination of climate and geography made Oakley a birding haven, and Audubon completed or began at least twenty-three bird paintings -- among his finest work -- while staying there. A Summer of Birds will inform and delight readers in its exploration of this eventful but unsung 1821 interlude, a fascinating chapter in the life of America's foremost bird artist. It is an indispensable pleasure for birders, Audubon enthusiasts, and visitors to Oakley House.
A Summer of Horses
by Carol FennerTen-year-old Faith struggles to overcome her fear of horses and her feelings of jealousy toward her talented older sister when they spend the summer on a horse farm.
Summer Wildflowers of the Northeast: A Natural History
by Carol GracieFrom the acclaimed author of Spring Wildflowers of the Northeast, a beautifully illustrated follow-up introduction to the summer-blooming wildflowers of the northeastern United States and CanadaThis exquisitely illustrated volume provides an accessible, in-depth introduction to summer-blooming wildflowers of the northeastern United States and Canada. Featuring more than 700 detailed color photos and a large, beautifully designed format, the book delves into the life histories of more than thirty-five wildflowers and their relatives, from common roadside favorites, such as asters and milkweeds, to interesting, lesser-known species, including Indian pipe and ginseng. Drawing on a wealth of personal experience and the latest scientific research, and presenting it all in terms anyone can understand, acclaimed naturalist and photographer Carol Gracie invites readers to enhance their appreciation of the beauty of these wildflowers by learning not just their names or how many petals they have, but what pollinates them, how their seeds are dispersed, how they interact with other plants and animals, how Native Americans and other people have used them, and other interesting facts.Each species is illustrated with a range of detailed color photos that not only capture its beauty but illustrate the features discussed in the text and show the plant in its environment alongside the pollinators, herbivores, or seed dispersers with which, in many cases, the wildflower has evolved. Other topics covered include the naming of wildflowers; pathogens and pests; related species in other parts of the world; and wildflowers in history, literature, and art.Presenting authoritative information in an inviting style, Summer Wildflowers of the Northeast is an ideal volume for wildflower lovers, outdoor enthusiasts, naturalists, students, and more.Showcases the most spectacular summer-blooming wildflowers of the northeastern United States and CanadaFeatures more than 700 stunning full-color photosCovers the life histories, lore, and uses of more than 35 species and their relativesCombines the latest scientific research with an easy-to-read styleFeatures species accounts for these wildflowers:Alpine Wildflowers ● American Cranberry ● American Ginseng ● American Lotus ● Asters ● Beechdrops ● Blackberry-lily ● Bog Orchids ● Broad-leaved Helleborine ● Buckbean ● Bunchberry ● Cardinal Flower ● Chicory ● Common Milkweed ● Common Mullein ● Evening-Primrose ● Fringed Gentian ● Fringed Orchids ● Goldenrods ● Grass-of-Parnassus ● Indian Pipe ● Jewelweed ● Jimsonweed ● Lilies ● Patridge-berry ● Passion-flowers ● Pipsissewa ● Prickly Pear ● Purple Pitcher Plant ● Queen Anne’s Lace ● Showy Lady-slipper ● Swamp Rose-mallow ● Wild Leek ● Wild Lupine ● Yellow Pond-lily
Summertime Sleepers: Animals That Estivate
by Melissa Stewart Sarah BrannenA 2022 Robert F. Sibert Honor BookEveryone knows about animals that hibernate in the winter. But it's time to discover animals that sleep all summer long! <p><p>All science classrooms discuss animals that hibernate during winter months, but few know about animals that estivate—a prolonged sleep during hot or dry periods. Dual layers of text awaken readers to the reasons estivating animals become dormant—whether it's because warm weather threatens food supply or to avoid increased body temperatures. From the ladybug to the salamander, from the lungfish to the desert hedgehog, twelve estivating animals and their habits—both when sleeping and awake—are explained through clear text and elegant watercolor illustrations that create a scrapbook feel. <P><P><i>Advisory: Bookshare has learned that this book offers only partial accessibility. We have kept it in the collection because it is useful for some of our members. Benetech is actively working on projects to improve accessibility issues such as these.</i>
Sumo
by Manuel S. RodriguezThis volume explores various methodologies to study biochemical, molecular, and cellular biology aspects of some processes regulated by protein SUMOylation. SUMO: Methods and Protocols is organized into four parts, and starts with an historical overview on protein SUMOylation and a presentation of the methods included in the book. The first part also includes a review on chromatin regulation by dynamic SUMO modifications. The second part focuses on in vitro techniques, including biochemical methods to study mechanistic aspects of protein SUMOylation. The third part includes protocols to be used with cell cultures, which often are the first approaches used in most laboratories. The final part includes methodologies adapted for the analysis in vivo using distinct model organisms. Written in the highly successful Methods in Molecular Biology series format, chapters include a brief introduction to the subject, a list of necessary materials and reagents, a step-by-step reproducible laboratory protocol ending with a Notes section on troubleshooting tips, and tips and strategies to avoid known pitfalls. Unique and cutting-edge, SUMO: Methods and Protocols provides a comprehensive source of protocols for specialists and researchers not familiar with this vital system.
SUMO Protocols
by Helle UlrichWhile the small ubiquitin-related modifier SUMO uses a conjugation and de-conjugation system closely related to that of ubiquitin itself, its functions are highly diverse and largely independent of the ubiquitin system. In SUMO Protocols, leading experts present a collection of methods intended to highlight important features unique to the biology of SUMO in order to support future SUMO research. The first half of the volume focuses on the identification and functional characterization of SUMO targets and interactors, while the second half covers essential biochemical methods for the manipulation of the enzymatic components of the SUMO system. Written in the highly successful Methods in Molecular BiologyTM series format, the chapters include brief introductions to the subject, lists of the necessary materials and reagents, step-by-step, readily reproducible laboratory protocols, and the Notes sections, which provide tips on troubleshooting and avoiding known pitfalls. Unique and cutting-edge, SUMO Protocols provides the necessary tools for biochemists, molecular and cellular biologists as well as research-oriented clinicians not yet familiar with this vital system.
SUMO Regulation of Cellular Processes
by G. WilsonOver a decade ago, a small cellular protein of 12 kDa, with 18% homology to the well-known ubiquitin protein, was co-discovered and termed Small Ubiquitin-like Modifier, or SUMO. Sumoylation is a post-translational modification that utilizes SUMO as the modifier group covalently attached to target substrates. This state-of-the art review on the sumoylation system deals with protein modification as it pertains to regulation of diverse cellular functions. Each chapter has been written by a leading researcher and covers the role of sumoylation in fundamental biochemical activities (transcription, RNA processing, chromatin remodelling, DNA repair, nucleocytoplasmic transport, ion channel regulation, and metabolic pathways). The text also examines the part sumoylation plays in critical cellular processes such as mitosis, meiosis, differentiation, senescence, and apoptosis. Lastly, the emerging role of sumoylation in specific diseases, including cancer and diabetes as well as neurodegenerative ones, is explored with an emphasis on defining molecular mechanisms that may provide new targets for treatment or prevention. While SUMO was discovered more than 10 years ago, this is still a relatively young field, and much remains to be discovered about the biochemical and biological properties of this modification system. In just the last few years, it has become clear that sumoylation modifies hundreds of cellular proteins, and there has been increased appreciation for the breadth of cellular functions that are impacted by this post-translational modification.
SUMO Regulation of Cellular Processes
by Van G. WilsonOver a decade ago, a small cellular protein of 12 kDa, with 18% homology to the well-known ubiquitin protein, was co-discovered and termed Small Ubiquitin-like Modifier, or SUMO. Sumoylation is a post-translational modification that utilizes SUMO as the modifier group covalently attached to target substrates. This state-of-the art review on the sumoylation system deals with protein modification as it pertains to regulation of diverse cellular functions. Each chapter has been written by a leading researcher and covers the role of sumoylation in fundamental biochemical activities (transcription, RNA processing, chromatin remodelling, DNA repair, nucleocytoplasmic transport, ion channel regulation, and metabolic pathways). The text also examines the part sumoylation plays in critical cellular processes such as mitosis, meiosis, differentiation, senescence, and apoptosis. Lastly, the emerging role of sumoylation in specific diseases, including cancer and diabetes as well as neurodegenerative ones, is explored with an emphasis on defining molecular mechanisms that may provide new targets for treatment or prevention. While SUMO was discovered more than 10 years ago, this is still a relatively young field, and much remains to be discovered about the biochemical and biological properties of this modification system. In just the last few years, it has become clear that sumoylation modifies hundreds of cellular proteins, and there has been increased appreciation for the breadth of cellular functions that are impacted by this post-translational modification.
SUMO Regulation of Cellular Processes
by Van G. WilsonOver a decade ago, a small cellular protein of 12 kDa, with 18% homology to the well-known ubiquitin protein, was co-discovered and termed Small Ubiquitin-like Modifier, or SUMO. Sumoylation is a post-translational modification that utilizes SUMO as the modifier group covalently attached to target substrates. This state-of-the art review on the sumoylation system deals with protein modification as it pertains to regulation of diverse cellular functions. Each chapter has been written by a leading researcher and covers the role of sumoylation in fundamental biochemical activities (transcription, RNA processing, chromatin remodelling, DNA repair, nucleocytoplasmic transport, ion channel regulation, and metabolic pathways). The text also examines the part sumoylation plays in critical cellular processes such as mitosis, meiosis, differentiation, senescence, and apoptosis. Lastly, the emerging role of sumoylation in specific diseases, including cancer and diabetes as well as neurodegenerative ones, is explored with an emphasis on defining molecular mechanisms that may provide new targets for treatment or prevention. While SUMO was discovered more than 10 years ago, this is still a relatively young field, and much remains to be discovered about the biochemical and biological properties of this modification system. In just the last few years, it has become clear that sumoylation modifies hundreds of cellular proteins, and there has been increased appreciation for the breadth of cellular functions that are impacted by this post-translational modification.
The Sun
by David AlexanderThe latest entry in the Greenwood Guides to the Universe series explores the Sun and observes that while it is ordinary in the context of a star in the universe, its proximity to the earth has generated significant advances in the study of astronomy and physics. Alexander (astrophysics, Rice U.) explores the Sun's roles as a timekeeper and mythological entity before providing scientific data on its surface, magnetism, atmosphere and climate. Appendices include interesting facts about the Sun and a glossary of terms so that novice and advanced students, as well as general readers, can appreciate the content. Annotation ©2009 Book News, Inc., Portland, OR (booknews.com)
Sun: Ready-to-read Level 1 (Weather Ready-to-reads Ser.)
by Marion Dane BauerThis book reveals certain facts about the sun and describes why sun is vital to life.
The Sun (Scholastic News Nonfiction Readers: Space Science)
by Melanie ChrismerUpdated art of solar system shows 8 planets and their orbits instead of 9 - New Pluto book includes a list of other dwarf planets, in addition to Pluto, in our solar system - Updated information on space missions, moons, and planets - Updated Web sites for further information in back matter.