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. From NASA scientists conducting trailblazing experiments in the sky, to governments building clandestine arsenals of biological airborne weapons, Air-Borne prompts us to look at the world with fresh eyes. Weaving together spellbinding history with the latest reporting on airborne threats to global health, this masterwork makes visible an invisible world.