The fourth podcast on www.cyclostratigraphy.org is by Zhixiang Wang. He talks about the Late Miocene sedimentary response to astronomical forcing in North-East Tibet. In this podcast, the reasons why an eolian sequence displays a completely different astronomical signature compared to a contemporaneous lacustrine section are explored. This discussion is based on scientific results, recently published in GSA Bulletin. The Intro music of this podcast is an excerpt of a piece based on the North Atlantic Oscillation from the "Aphrodite's Dew" book and CD project by Arvid Tomayko and Sandro Montanari. Check out more of their work at arvidtomayko.com