{"version":1,"type":"rich","provider_name":"Libsyn","provider_url":"https:\/\/www.libsyn.com","height":90,"width":600,"title":"Secrets of Earth\u2019s climate in six-million-year-old ice","description":"Air quality and pet health Science Sessions are brief conversations with cutting-edge researchers, National Academy members, and policymakers as they discuss topics relevant to today's scientific community. Learn the behind-the-scenes story of work published in the Proceedings of the National Academy of Sciences (PNAS), plus a broad range of scientific news about discoveries that affect the world around us. In this episode, Sarah Shackleton shares climate lessons learned from 6 million-year-old ice. In this episode, we cover: \u2022[00:00] Introduction \u2022[01:02] Paleoclimate and ice scientist Sarah Shackleton introduces the information researchers can glean from ice cores. \u2022[02:02] She recounts the age extent of previous ice cores. \u2022[03:03] Shackleton describes the Allan Hills Ice Area. \u2022[04:35] She describes the method for ascertaining the age of air in an ice core. \u2022[05:49] She explains the results of the study and the insights into the climate in Antarctica over the last 6 million years. \u2022[06:32] Shackleton talks about the ice at the base of the core, and the research implications of the study. \u2022[08:13] Caveats and limitations of the study. \u2022[09:11] Conclusion. About Our Guest: Sarah Shackleton Assistant scientist Woods Hole Oceanographic Institution View related content here: https:\/\/www.pnas.org\/doi\/abs\/10.1073\/pnas.2502681122 Follow us on Spotify,  Apple Podcasts, or wherever you get your podcasts for more captivating discussions on scientific breakthroughs! Visit Science Sessions on PNAS.org: https:\/\/www.pnas.org\/about\/science-sessions-podcast&amp;nbsp; Follow PNAS: Twitter\/X Facebook LinkedIn YouTube Sign up for the PNAS Highlights newsletter ","author_name":"PNAS Science Sessions","author_url":"http:\/\/pnas-science-sessions-podcast.libsyn.com\/website","html":"<iframe title=\"Libsyn Player\" style=\"border: none\" src=\"\/\/html5-player.libsyn.com\/embed\/episode\/id\/39673410\/height\/90\/theme\/custom\/thumbnail\/yes\/direction\/forward\/render-playlist\/no\/custom-color\/88AA3C\/\" height=\"90\" width=\"600\" scrolling=\"no\"  allowfullscreen webkitallowfullscreen mozallowfullscreen oallowfullscreen msallowfullscreen><\/iframe>","thumbnail_url":"https:\/\/assets.libsyn.com\/secure\/item\/39673410"}