In her new book The Sixth Extinction, New Yorker staff writer Elizabeth Kolbert makes the case that we’re living in the sixth massive die-off of species in our planet’s history. Corraling evidence from zoologists, environmentalists and more, Kolbert argues that human activity is the cause of this latest event. In a review over at Vulture, Kathryn Schulz writes that Kolbert “makes a page-turner out of even the most sober and scientifically demanding aspects of extinction.”