Oxygen
The molecule that made the world
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5.0 • 1 calificación
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- USD 13.99
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- USD 13.99
Descripción editorial
Oxygen has had extraordinary effects on life.
Three hundred million years ago, in Carboniferous times, dragonflies grew as big as seagulls, with wingspans of
nearly a metre. Researchers claim they could have flown only if the air had contained more oxygen than today -
probably as much as 35 per cent. Giant spiders, tree-ferns, marine rock formations and fossil charcoals
all tell the same story. High oxygen levels may also explain the global firestorm that contributed to the
demise of the dinosaurs after the asteroid impact.
The strange and profound effects that oxygen has had on the evolution of life pose a riddle, which this book
sets out to answer. Oxygen is a toxic gas. Divers breathing pure oxygen at depth suffer from convulsions
and lung injury. Fruit flies raised at twice normal atmospheric levels of oxygen live half as long as their
siblings. Reactive forms of oxygen, known as free radicals, are thought to cause ageing in people. Yet if
atmospheric oxygen reached 35 per cent in the Carboniferous, why did it promote exuberant growth,
instead of rapid ageing and death?
Oxygen takes the reader on an enthralling journey, as gripping as a thriller, as it unravels the unexpected
ways in which oxygen spurred the evolution of life and death. The book explains far more than the size of
ancient insects: it shows how oxygen underpins the origin of biological complexity, the birth of photosynthesis, the sudden evolution of animals, the need for two sexes, the accelerated ageing of cloned animals like Dolly the sheep, and the surprisingly long lives of bats and birds.
Drawing on this grand evolutionary canvas, Oxygen offers fresh perspectives on our own lives and deaths,
explaining modern killer diseases, why we age, and what we can do about it. Advancing revelatory new ideas,
following chains of evidence, the book ranges through many disciplines, from environmental sciences to
molecular medicine. The result is a captivating vision of contemporary science and a humane synthesis of our
place in nature. This remarkable book will redefine the way we think about the world.
PUBLISHERS WEEKLY
Opening this gorgeous hunk of a book is like walking into a high-end jewelry gallery. There are 500 full-color photographs of beaded jewelry necklaces, rings, bracelets, pins and earrings created by 275 artists with beads, wire, filament, and fiber. Some of the artists are well-known to beaders, like Carol Wilcox Wells and Diane Fitzgerald, and some not-so-well-known, with their work published for the first time. This makes for a heady blend of inspiration, ideas, and expression. Editor Hemachandra selected the 500 beaded objects from submissions by 360 artists from 30 countries. To his credit, no single style bead weaving, bead embroidery, bead stringing gets short shrift. The photography is of high professional standards, no Instagram shots by amateurs posted to Facebook, and is also instructively illustrative of the beadwork, offering closeup shots that will help the aspiring bead worker reproduce some of the techniques. One quibble: it would have been nice to include the artists' countries of origin just below the photo of their work instead of in the index, saving the reader a lot of flipping back and forth. A list of artists' Web sites would have been nice, too.
