Weekend field trips on the Webhttp://cosmiclog.msnbc.msn.com/archive/2008/09/05/1356257.aspx Spaceflight Now: NASA chief not optimistic about spaceflight gap New Scientist: These robot legs have a spring in their step Technology Review: Intensifying the sun 'Nova' on PBS: 'Hitler's Sunken Secret'  The Economist: The frugal cornucopianen-USCommunityServer 2.0 (Build: 60608.1)