"9780805092998" . "853618709" . . "The Sixth Extinction: An Unnatural History is a 2014 nonfiction book written by Elizabeth Kolbert and published by Henry Holt & Company. The book covers past mass extinctions and demonstrates that the earth and humans are in the midst of a \"sixth\" mass extinction. She chronicles previous mass species extinction events, as well as specific species extinguished by humans, and she includes the accelerated widespread extinction of many species during our present time."@en . . "576.8/4" . . . "QE721.2.E97 K65 2014" . . "319"^^ . . . . .