This has led the researchers to conclude that it instead hitched a ride there with other animals via the wildlife trade, consistent with what happened during the SARS outbreak in 2002. The study was ...

Leave it to beavers . . . to fix the environment for us. Eager: The Suprising, Secret Life of Beavers, by Ben Goldfarb, Chelsea Green Publishing, 304 pages, $24.95. Buy it online at Chelsea Green.