https://pinboard.in/u:Knusper2000/public/ recent bookmarks from Knusper2000 2012-11-26T20:33:49+00:00 http://www.journals.elsevier.com/acta-astronautica Knusper2000 astronomy journal science exploration resource reading https://pinboard.in/ https://pinboard.in/u:Knusper2000/b:163a186c9131/ 2012-02-06T19:32:45+00:00 http://www.fractalwalk.net/ Knusper2000 fractals fractal software math exploration https://pinboard.in/ https://pinboard.in/u:Knusper2000/b:020e3fa64178/ 2011-01-02T15:51:42+00:00 http://www.undercity.org/ Knusper2000 photography urban nyc exploration architecture underground art history https://pinboard.in/u:Knusper2000/b:51ddbf1a9ac6/ 2009-02-08T12:34:29+00:00 http://www.forgotten-ny.com/ Knusper2000 reference images Ny urban brooklyn photography exploration history nyc photos culture travel photo guide newyork city https://pinboard.in/u:Knusper2000/b:d7e6d2170e24/ 2008-11-28T23:12:32+00:00 http://www.centauri-dreams.org/ Knusper2000science reference astronomy blog exploration physics space astrophysics blogs academic paper wissenschaft forschung https://pinboard.in/u:Knusper2000/b:e5d713961bd5/