Kirjahaku

We don't just live in the air; we live because of it. It's the most miraculous substance on earth, responsible for our food, our weather, our water, and our ability to hear. In this exuberant book, gifted science writer Gabrielle Walker peels back the layers of our atmosphere with the stories of the people who uncovered its secrets: - A flamboyant Renaissance Italian discovers how heavy our air really is: The air filling Carnegie Hall, for example, weighs seventy thousand pounds. - A one-eyed barnstorming pilot finds a set of winds that constantly blow five miles above our heads. - An impoverished American farmer figures out why hurricanes move in a circle by carving equations with his pitchfork on a barn door. - A well-meaning inventor nearly destroys the ozone layer. - A reclusive mathematical genius predicts, thirty years before he's proved right, that the sky contains a layer of floating metal fed by the glowing tails of shooting stars.

Did the Earth once undergo a super ice age, one that froze the entire planet? A global adventure story and a fascinating account of scientist Paul Hoffman's quest to prove his maverick 'Snowball Earth' theory, this is science writing at its most gripping. In "Snowball Earth", Gabrielle Walker takes us on a thrilling natural history expedition in search of supporting evidence for the audacious theory which argues that the Earth experienced a climatic cataclysm 600 million years ago that froze the entire planet from the poles to the equator. Because the global snowball happened so long ago the ice has now long gone - but it left its traces in rocks around the world and in order to see the evidence, Walker visited such places as Australia, Namibia, South Africa and Death Valley, USA. Part adventure story and part travel book, it's a tale of the ultimate human endeavour to understand our origins.

We not only live in the air, we live because of it. At ground level air transforms miraculously; it wraps our planet in a blanket of warmth, while the outer layer of our atmosphere soaks up violent flares from the sun. In this fascinating celebration of the Earth's fragile atmosphere, Gabrielle Walker traces a journey of groundbreaking scientific discovery from the first experiments in the Renaissance to recent findings in space.

There have been many books about Antarctica in the past, but all have focused on only one aspect of the continent - its science, its wildlife, the heroic age of exploration, personal experiences or the sheer awesome beauty of the landscape- but none have managed to capture the whole story, until now.Gabrielle Walker, author, consultant to New Scientist and regular broadcaster with the BBC has written a book unlike any that has ever been written about the continent. Antarctica weaves all the significant threads into an intricate tapestry, made up of science, natural history, poetry, epic history, what it feels like to be there and why it draws so many different kinds of people back there again and again. It is only when all the parts come together that the underlying truths of the continent emerge. Antarctica is the most alien place on Earth, the only part of our planet where humans could never survive unaided. It is truly like walking on another planet. And yet, in its silence, its agelessness and its mysteries lie the secrets of our past, and of our future.

¿Sucumbió la Tierra a una superglaciación, en la que todo el planeta, desde los polos al Ecuador, quedó cubierto de hielo? En Cataclismo climático, la escritora Gabrielle Walker ha creado una historia de aventuras e intriga a escala global, siguiendo los pasos del brillante científico Paul Hoffman y de un elenco de intrépidos geólogos en su batida por el planeta. De ese modo, descubre una pista sorprendente tras otra y pretende demostrar que hace setecientos millones de años la Tierra se congeló por completo y se convirtió en una gigantesca «bola de nieve» en el transcurso de la peor catástrofe climática de la historia.Lejos de acabar con la vida en la Tierra, este proceso de ultracongelación global fue el desencadenante de la explosión cámbrica, ese momento en la historia de nuestro planeta en que emergieron las formas de vida actuales.