I haven't seen this posted elsewhere...
Steve Squyres was interviewed on "Talk of the Nation" on National Public Radio on 15/9/2006.
You can listen to it here (with your choice of Real Player or Window Media Player):
http://www.npr.org/templates/story/story.php?storyId=6082169
And there is an mp3 version here:
http://media.libsyn.com/media/sciencefrida...-2006091526.mp3
(Most of the content, except perhaps near the end, will probably be already be familiar to most members of this forum.)
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Stephen