A new book chronicles the science of life in the air 

Air-BorneCarl ZimmerDutton, $32 On March 10, 2020, 61 choir members rehearsed in a church hall in Skagit County, Wash. As they sang, a microscopic germ wafted through the air. Before the month’s end, 58 members were infected and five fell gravely ill. Across the United States, the virus wreaked havoc. Within weeks, thousands of people…

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