Addresses the fundamental question of what it means to be alive from the perspective of a microbe, E. coli, that exists within all human beings, examining the germ's evolution and its important role in the history of biology.

"An extraordinary history of the perils and promise of every breath we take" - James Nestor, bestselling author of Breath "Another brilliant work from one of the very best science writers, Air-Borne will leave you agog at the incredible world that floats unseen around us" - Ed Yong, bestselling author of An Immense World -------------------------------------- Every day we draw in two thousand gallons of air - and thousands of living things. From the ground to the stratosphere, the air teems with invisible life. In Air-Borne , award-winning New York Times columnist and Baillie Gifford-shortlisted author Carl Zimmer leads us on an odyssey through the living atmosphere and through the history of its discovery. We follow Amelia Earhart and Charles Lindbergh above the clouds, where they conducted groundbreaking experiments, and meet NASA scientists who send balloons even higher, to search for life in the stratosphere. Zimmer chronicles the dark side of aerobiology with gripping accounts of how the United States and the Soviet Union clandestinely built arsenals of biological weapons designed to spread anthrax and smallpox. Air-Borne prompts us to look at the world with new eyes - as a place where the oceans and forests loft trillions of cells into the air, where microbes eat clouds, and where life soars thousands of miles on the wind. Weaving together spellbinding history with the latest reporting on airborne threats to global health, this masterwork makes visible an invisible world.

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Deep within the earth's crust there exists a second biosphere, composed of very primitive heat-loving bacteria and containing perhaps more living matter than is present on the earth's entire surface. That is the astounding premise of this new book by Thomas Gold, one of the twentieth century's most distinguished scientists and a man with a long history of proposing seemingly preposterous theories that later prove correct. Gold joins the deep hot biosphere argument to another, perhaps even more controversial theory for which he has marshalled evidence: that so-called fossil fuels originate not from compressed biological matter at all but from deep within the earth, present there since the planet's formation, long before our oxygen-rich surface biosphere came into existence.

In 1898, an Austrian microbiologist Heinrich Winterberg made a curious observation: the number of microbial cells in his samples did not match the number of colonies formed on nutrient media (Winterberg 1898). About a decade later, J. Amann qu- tified this mismatch, which turned out to be surprisingly large, with non-growing cells outnumbering the cultivable ones almost 150 times (Amann 1911). These papers signify some of the earliest steps towards the discovery of an important phenomenon known today as the Great Plate Count Anomaly (Staley and Konopka 1985). Note how early in the history of microbiology these steps were taken. Detecting the Anomaly almost certainly required the Plate. If so, then the period from 1881 to 1887, the years when Robert Koch and Petri introduced their key inventions (Koch 1881; Petri 1887), sets the earliest boundary for the discovery, which is remarkably close to the 1898 observations by H. Winterberg. Celebrating its 111th anniversary, the Great Plate Count Anomaly today is arguably the oldest unresolved microbiological phenomenon. In the years to follow, the Anomaly was repeatedly confirmed by all microb- logists who cared to compare the cell count in the inoculum to the colony count in the Petri dish (cf., Cholodny 1929; Butkevich 1932; Butkevich and Butkevich 1936). By mid-century, the remarkable difference between the two counts became a universally recognized phenomenon, acknowledged by several classics of the time (Waksman and Hotchkiss 1937; ZoBell 1946; Jannasch and Jones 1959).