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http://media.blubrry.com/echoespodcast/www.xpn.org/podcasts/echoes/echoes20090617.mp3Podcast: Play in new window | DownloadSubscribe: RSS Echoes from the Alaskan Tundra: John Luther Adams You can hear an audio version of this blog with music here Imagine a place where music changes according to time of day, geomagnetic activity, aurora shimmers, the path of the sun and moon through the sky and seismic…