Podcast:TED Radio Hour Published On: Fri Jun 22 2018 Description: Some scientists say we're in a new geological age where humans are having an unprecedented impact on Earth. This hour, TED speakers ask what this means for the future of our planet, and our species. Guests include paleontologists Kenneth Lacovara and Peter Ward, environmental writer Emma Marris, and biodiversity archivist Cary Fowler. (Original broadcast date: September 30, 2016.)