By Douglas Macdougall
During this engrossing and obtainable publication, Doug Macdougall explores the motives and results of ice a long time that experience gripped our planet all through its heritage, from the earliest recognized glaciation—nearly 3 billion years ago—to the current. Following the improvement of medical principles approximately those dramatic occasions, Macdougall strains the lives of some of the very good and fascinating characters who've contributed to the evolving realizing of the way ice a while happen. because it explains how the good Pleistocene Ice Age has formed the earth's panorama and encouraged the process human evolution, Frozen Earth additionally offers a desirable examine how technological know-how is finished, how the buzz of discovery drives scientists to discover and examine, and the way timing and probability play a component within the popularity of latest medical ideas.
Macdougall describes the remarkable strength of cataclysmic floods that marked the melting of the glaciers of the Pleistocene Ice Age. He probes the chilling proof for "Snowball Earth," an episode a ways again within the earth's prior which may have obvious our planet encased in ice from pole to pole. He discusses the gathering facts from deep-sea sediment cores, in addition to ice cores from Greenland and the Antarctic, that means fast-changing ice age climates can have at once impacted the evolution of our species and the process human migration and civilization. Frozen Earth additionally chronicles how the idea that of the ice age has gripped the mind's eye of scientists for nearly centuries. It deals an soaking up attention of ways present reports of Pleistocene weather may also help us comprehend earth's destiny weather adjustments, together with the query of whilst the subsequent glacial period will happen.
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Extra resources for Frozen Earth: The Once and Future Story of Ice Ages
My grandfather, Stephen John Hay, moved to the young town of Dallas from Georgia in 1887. He was Mayor of Dallas from 1907 to 1911. He was a political innovator, introducing the Commissioner form of government to Dallas, and saw to it that the involvement of national political parties in local affairs was minimal. He was also a champion of higher education and believed that Dallas needed a major institution of higher learning. He was intimately involved in the founding of Southern Methodist University in 1911.
In the early days of geology, observations were made with the eyes, a hammer to knock off a fresh chunk of rock, and sometimes a hand lens (a small magnifying glass) to take a close look at the rock. Since the middle of the last century increasingly more sophisticated methods have been developed; some of these are described in the later chapters of this book. 1 (continued) Word American public’s use Meaning in science Uncertainty Ignorance The amount of variation in a numerical result that is consistent with observation Values Worth or quality as measured by a standard of equivalence.
Denial is the rejection of ideas without objective consideration. 1). 1 Words with special meanings to scientists Word American public’s use Meaning in science Accuracy The state or quality of being accurate; the extent to which something is accurate; precision, exactness The closeness of a measurement, calculation, or speciﬁcation to the correct value Anomaly Abnormality Difference from long-term average Bias An inclination, leaning, tendency, bent; a preponderating disposition or propensity; pre-dilection; prejudice A systematic distortion of an expected statistical result due to a factor not allowed for in its derivation; also, a tendency to produce such distortion Error Something incorrectly done through ignorance or inadvertence; a mistake The quantity by which a result obtained by observation or by approximate calculation differs from an accurate determination Manipulation The exercise of subtle, underhand, or devious influence or control.