With the human population in explosive expansion, it is easy to forget the Earth is going through the most rapid extinction crisis the world has ever seen. Joining us today to help us digest the great amount of information being amassed around the globe about this major juncture in Earth's history, is Elizabeth Kolbert. Elizabeth is a staff writer for the New Yorker, author of Field Notes from a Catastrophe: Man, Nature and Climate Change, and most recently The Sixth Extinction: An Unnatural History, which has just won the Pulitzer Prize for Non-fiction. Produced by Ayana and March Young.