The information contained in Elizabeth Kolbert’s book, The Sixth Extinction: An Unnatural History, should concern all humans alive today. The facts presented have been known to the scientific community for a number of years. Its message is clear and important: the human species has been the chief cause of a massive extinction not seen since the dinosaurs perished. Biological diversity has been decreasing for a long time. She presents the facts in a clear and fascinating story; visiting numerous places around the globe and witnessing first hand the effects of “The New Pangea.” The Washington Post’s review of Kolbert’s book.