The Earth population has endured 5 massive extinctions since time immemorial. And now we're undergoing the sixth, but much of it is because of us, human beings. Ms. Kolbert explores the past events and weighs on the future of Earth life through deep research and analysis. The seriousness of the thesis becomes bearable with her reporting style [she's a full time ”New Yorker” journalist] and I love her witty and humorous takes on science. • Life is short. Read fantastic books.