Altri libri che potrebbero interessarti

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  Triassic Period The: The History...

  Charles River Editors

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  Scientists have long attempted to understand Earth’s past, and in service to that effort, they have divided the world’s history into eons, eras, periods, epochs and ages. For example, the current eon is called the Phanerozoic, which means “visible life.” This is the eon in which multi-cellular life has evolved and thrived. Before this, life was microscopic (single cell). 
  	The Phanerozoic eon is divided into 3 eras - Paleozoic (“old life”), Mesozoic (“middle life”) and Cenozoic (“new life”). From there, the Mesozoic era is divided into 3 periods - Triassic, Jurassic and Cretaceous. 
  	Before the Triassic, primitive life had built up in the oceans and seas, and some lifeforms finally had crawled onto land during the Paleozoic era. With that, life had become well established, but then came the Permian-Triassic mass extinction, the worst extinction event in the history of the planet. At the end of the Triassic, another extinction event cleared the way for dinosaurs to become the dominant set of species in the Jurassic. 
  	Though the Triassic does not have as interesting a list of creatures as those in the Jurassic and Cretaceous, such as Tyrannosaurus rex, Stegosaurus, Pterodactyls, Brontosaurus, and the like, the life which reclaimed the Earth and then thrived during this period was no less important. Life during the Triassic spent nearly 60% of its time recovering from the Permian-Triassic extinction event, roughly 30 million years. What had been built up was then slammed by nature, effectively clearing the board once more for new species to take over.

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  NPR Sound Treks: Animals -...

  NPR

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  From rainforests to deserts, mountains to plains, the sea to the sky, animals raise their voices in an eclectic and thrilling chorus. This collection celebrates the unique calls of the keel-billed toucan, Guatemalan coatimundi, hammerhead bat, Central African elephant, urban katydid, and many more intriguing creatures whose sounds we seldom hear.The NPR Sound Treks series features outstanding audio documentaries, stories, and commentary from the NPR archives. Each volume features sounds from nature, insights from experts and others who love the outdoor experience (naturalists, zoologists, biologists, adventurers, even a cowgirl), and vivid storytelling that captures the excitement of the wilderness.Contents:Introduction by Jon HamiltonHoly Baboon! A “Mystical” Moment In AfricaRadio Gift: John Nielsen and Wild AnimalsDecoding The Hyena’s LaughAlpha Bison: The Quieter Bellow Wins the FemalesMaking “Living With Lions” Practical in KenyaOtterly Adorable, But Born to be WildRecording Story Rattles ProducerClose Encounters with the Adirondack Black BearHear Them Roar: Noisy New World MonkeysWhat Wildlife Lurks in Central Park By Night?Slo-Mo Cricket Chirps Reveal Secret SerenadesSounds Give Researchers Clues to ElephantsChasing After the Elusive Narwhal

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  Natural Selection

  J. Phil Gibson, Terri R. Gibson

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  An informative introduction to Darwin's discovery. In his groundbreaking book Natural Selection, Charles Darwin explained his theory that evolution is driven by adaptation of species to their environmental surroundings. From the tiniest microbe to the largest whale, all organisms have changed over vast expanses of time due to the forces of natural selection.  This title in the Science Foundations series provides an overview of the processes and causes that drive natural selection and the principles that explain how it operates, using numerous diverse organisms as examples. Natural Selection promotes a solid understanding of how organisms change over the course of generations and how current biodiversity came to be. The book is published by Chelsea House Publishers, a leading publisher of educational material.

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  The Search for Life on Mars -...

  Elizabeth Howell, Nicholas Booth

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  From The War of the Worlds to The Martian and to the amazing photographs sent back by the robotic rovers Curiosity and Opportunity, Mars has excited our imaginations as the most likely other habitat for life in the solar system. Now the Red Planet is coming under scrutiny as never before. As new missions are scheduled to launch this year from the United States and China, and with the European Space Agency's ExoMars mission now scheduled for 2022, this book recounts in full the greatest scientific detective story ever. For the first time in forty years, the missions heading to Mars will look for signs of ancient life on the world next door. It is the latest chapter in an age?old quest that encompasses myth, false starts, red herrings, and bizarre coincidences—as well as triumphs and heartbreaking failures. This book, by two journalists with deep experience covering space exploration, is the definitive story of how life's discovery has eluded us to date, and how it will be found somewhere and sometime this century. The Search for Life on Mars is based on more than a hundred interviews with experts at NASA’s Jet Propulsion Laboratory and elsewhere, who share their insights and stories. While it looks back to the early Mars missions such as Viking 1 and 2, the book's focus is on the experiments and revelations from the most recent ones—including Curiosity, which continues to explore potentially habitable sites where water was once present, and the Mars Insight lander, which has recorded more than 450 marsquakes since its deployment in late 2018—as well as on the Perseverance and ExoMars rover missions ahead.And the book looks forward to the newest, most exciting frontier of all: the day, not too far away, when humans will land, make the Red Planet their home, and look for life directly.

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  Before the Refrigerator - How We...

  Jonathan Reese

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  A historical study of how increased access to ice—decades before refrigeration—transformed American life. During the late nineteenth and early twentieth centuries, Americans depended upon ice to stay cool and to keep their perishable foods fresh. Jonathan Rees tells the fascinating story of how people got ice before mechanical refrigeration came to the household. Drawing on newspapers, trade journals, and household advice books, Before the Refrigerator explains how Americans built a complex system to harvest, store, and transport ice to everyone who wanted it, even the very poor. Rees traces the evolution of the natural ice industry from its mechanization in the 1880s through its gradual collapse, which started after World War I. Meatpackers began experimenting with ice refrigeration to ship their products as early as the 1860s. Starting around 1890, large, bulky ice machines the size of small houses appeared on the scene, becoming an important source for the American ice supply. As ice machines shrunk, more people had access to better ice for a wide variety of purposes. By the early twentieth century, Rees writes, ice had become an essential tool for preserving perishable foods of all kinds, transforming what most people ate and drank every day. Reviewing all the inventions that made the ice industry possible and the way they worked together to prevent ice from melting, Rees demonstrates how technological systems can operate without a central controlling force. Before the Refrigerator is ideal for history of technology classes, food studies classes, or anyone interested in what daily life in the United States was like between 1880 and 1930.“An in-depth portrayal of a once-indispensable, life-changing technology, the former existence of which is as unknown to most of us as that of the telegraph or canal is to today’s undergraduates. . . . Rees synthesizes considerable archival research and presents interpretations of importance to scholars. . . . Before the Refrigerator is as refreshing as ice water on a hot summer day.” —Journal of American History“This fact-filled book explains how ice became an American necessity by the early twentieth century. Students in business history and history of technology courses will be fascinated to learn how macrobreweries made lager into America’s favorite beer, how cocktails became commonplace, and how burly men used to lug giant blocks of ice into American kitchens.” —Shane Hamilton, author of Trucking Country: The Road to America’s Wal-Mart Economy

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  Tracing Your Family History on...

  Chris Patton

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  A genealogist’s practical guide to researching family history online while avoiding inaccurate, incomplete, or misleading information.   The internet has revolutionized family history research—every day new records and resources are placed online and new methods of sharing research and communicating become available. Never before has it been so easy to research family history and to gain a better understanding of who we are and where we came from.   But, as British genealogist Chris Paton demonstrates in this straightforward, practical guide, while the internet is an enormous asset, it is also something to be wary of. Researchers need to take a cautious approach to the information they acquire on the web. Where did the original material come from? Has it been accurately reproduced? Why was it put online? What has been left out and what is still to come?   As he leads researchers through the multitude of resources that are now accessible online with an emphasis on UK and Ireland sites, Chris Paton helps to answer these questions. He shows what the internet can and cannot do—and he warns against the various traps researchers can fall into along the way.

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