Some context: http://nasawatch.com/archives/2010/04/is-a-human-spac.html http://nasawatch.com/archives/2010/04/is-a-human-spac.html (definitely worth reading th

Some context: http://nasawatch.com/archives/2010/04/is-a-human-spac.html http://nasawatch.com/archives/2010/04/is-a-human-spac.html (definitely worth reading the comments on that too)