T REX AND THE CRATER OF DOOM

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T Rex And The Crater Of Doom

Author : Walter Alvarez
ISBN : 0691131031
Genre : Science
File Size : 41.70 MB
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Sixty-five million years ago, a comet or asteroid larger than Mt. Everest slammed into the Earth, causing an explosion equivalent to the detonation of a hundred million hydrogen bombs. Vaporized impactor and debris from the impact site were blasted out through the atmosphere, falling back to Earth all around the globe. Terrible environmental disasters ensued, including a giant tsunami, continent-scale wildfires, darkness, and cold, followed by sweltering greenhouse heat. When conditions returned to normal, half the genera of plants and animals on Earth had perished. This horrific story is now widely accepted as the solution to a great scientific murder mystery: what caused the extinction of the dinosaurs? InT. rex and the Crater of Doom, the story of the scientific detective work that went into solving the mystery is told by geologist Walter Alvarez, one of the four Berkeley scientists who discovered the first evidence for the giant impact. It is a saga of high adventure in remote parts of the world, of patient data collection, of lonely intellectual struggle, of long periods of frustration ended by sudden breakthroughs, of intense public debate, of friendships made or lost, of the exhilaration of discovery, and of delight as a fascinating story unfolded. Controversial and widely attacked during the 1980s, the impact theory received confirmation from the discovery of the giant impact crater it predicted, buried deep beneath younger strata at the north coast of the Yucatán Peninsula. The Chicxulub Crater was found by Mexican geologists in 1950 but remained almost unknown to scientists elsewhere until 1991, when it was recognized as the largest impact crater on this planet, dating precisely from the time of the great extinction sixty-five million years ago. Geology and paleontology, sciences that long held that all changes in Earth history have been calm and gradual, have now been forced to recognize the critical role played by rare but devastating catastrophes like the impact that killed the dinosaurs.
Category: Science

A Most Improbable Journey A Big History Of Our Planet And Ourselves

Author : Walter Alvarez
ISBN : 9780393292701
Genre : Science
File Size : 56.14 MB
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"A thrilling synthesis from a brilliant scientist who discovered one of the most important chapters in our history." —Sean B. Carroll Big History, the field that integrates traditional historical scholarship with scientific insights to study the full sweep of our universe, has so far been the domain of historians. Famed geologist Walter Alvarez—best known for the “Impact Theory” explaining dinosaur extinction—has instead championed a science-first approach to Big History. Here he wields his unique expertise to give us a new appreciation for the incredible occurrences—from the Big Bang to the formation of supercontinents, the dawn of the Bronze Age, and beyond—that have led to our improbable place in the universe.
Category: Science

Asteroids Pb

Author : PEEBLES CURTIS
ISBN : 9781560989820
Genre : Science
File Size : 86.17 MB
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Asteroids suggest images of a catastrophic impact with Earth, triggering infernos, tidal waves, famine, and death — but these scenarios have obscured the larger story of how asteroids have been discovered and studied. During the past two centuries, the quest for knowledge about asteroids has involved eminent scientists and amateur astronomers, patient research and sudden intuition, advanced technology and the simplest of telescopes, newspaper headlines and Cold War secrets. Showing how asteroid research is increasingly collaborative, Peebles's Asteroids provides insights into the evolution of scientific ideas and the ebb and flow of scientific debate.
Category: Science

The End Of The Dinosaurs

Author : Charles Frankel
ISBN : 0521474477
Genre : Science
File Size : 79.90 MB
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Investigates the idea that the natural disaster many scientists suspect caused the extinction of the dinosaurs occurred near Puerto Chicxulub, Mexico, when an asteroid collided with Earth, releasing deadly amounts of energy.
Category: Science

The Mountains Of Saint Francis Discovering The Geologic Events That Shaped Our Earth

Author : Walter Alvarez
ISBN : 039307093X
Genre : Science
File Size : 43.8 MB
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The major new work by the best-selling author of T. Rex and the Crater of Doom--a fascinating history. Walter Alvarez and his team made one of the most astonishing scientific discoveries of the twentieth century--that an asteroid smashed into the Earth 65 million years ago, exterminating the dinosaurs. Alvarez had the first glimmer of that amazing insight when he noticed something odd in a rock outcrop in central Italy. Alvarez now returns to that rich terrain, this time to take the reader on an distant past. We encounter the volcanoes that formed the Seven Hills of Rome; the majestic limestone Apennine mountains that started to develop millions of years ago under water; the evidence that the Mediterranean Sea completely evaporated to a sunken desert, perhaps several times; and the proof that continental plates once overran one another to form telling, all major geologic episodes are as dramatic as the great impact that killed the dinosaurs, even when they happen over eons and without huge creatures to witness them.
Category: Science

Falling Stars

Author : Mike D. Reynolds
ISBN : 9780811742214
Genre : Science
File Size : 68.13 MB
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Month-by-month information on meteor showers and how to make the most of watching them. Advice on starting and building a meteorite collection plus the scientific explanation of what meteors are and where they come from. Includes new information about recent space exploration and studies of meteors.
Category: Science

Four Revolutions In The Earth Sciences

Author : James Lawrence Powell
ISBN : 9780231538459
Genre : Science
File Size : 44.4 MB
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Over the course of the twentieth century, scientists came to accept four counterintuitive yet fundamental facts about the Earth: deep time, continental drift, meteorite impact, and global warming. When first suggested, each proposition violated scientific orthodoxy and was quickly denounced as scientific—and sometimes religious—heresy. Nevertheless, after decades of rejection, scientists came to accept each theory. The stories behind these four discoveries reflect more than the fascinating push and pull of scientific work. They reveal the provocative nature of science and how it raises profound and sometimes uncomfortable truths as it advances. For example, counter to common sense, the Earth and the solar system are older than all of human existence; the interactions among the moving plates and the continents they carry account for nearly all of the Earth's surface features; and nearly every important feature of our solar system results from the chance collision of objects in space. Most surprising of all, we humans have altered the climate of an entire planet and now threaten the future of civilization. This absorbing scientific history is the only book to describe the evolution of these four ideas from heresy to truth, showing how science works in practice and how it inevitably corrects the mistakes of its practitioners. Scientists can be wrong, but they do not stay wrong. In the process, astonishing ideas are born, tested, and over time take root.
Category: Science

Science In The Contemporary World

Author : Eric Gottfrid Swedin
ISBN : 9781851095247
Genre : Reference
File Size : 83.37 MB
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This work is a unique introductory A–Z resource detailing the scientific achievements of the contemporary world and analyzing the key scientific trends, discoveries, and personalities of the modern age. * Over 200 A–Z entries covering topics ranging from plate tectonics to the first Moon landings * More than 40 stunning photographs providing a unique pictorial chronicle of the achievements of modern science
Category: Reference

The Handy Dinosaur Answer Book

Author : Patricia Barnes-Svarney
ISBN : 9781578593262
Genre : Nature
File Size : 79.20 MB
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Featuring more than 600 questions about dinosaurs—such as What dinosaurs are thought to have evolved into birds? Did dinosaurs travel in herds? and Where and what is the Dinosaur Freeway?—this fun-filled fact-book provides a wealth of information on the lives and habits of these astonishing creatures. From the Tyrannosaurus rex to the Stegosaurus, the guide profiles numerous species, chronicling their time on earth and exploring their roles in archaeological expeditions and museums today. Delightful and intriguing, this comprehensive record includes the debates still surrounding the origins and fate of these creatures that dominated the earth for millions of years but seemed to disappear in the blink of an eye.
Category: Nature