May 2, 2015 This week on Sierra Club Radio:In conversation with Elizabeth Kolbert on on her book The Sixth Extinction, which just won the Pulitzer prize for nonfiction. Related Topics: wildlife, see all stories Up Next Próximo Artículo An Old Disease Decimates the Wolves of YellowstoneByPor Melanie Haiken Jul 12 2026 2026-07-12