See: http://ww.afrlhorizons.com/Briefs/Feb04/ML0226.html
See: http://www.wstf.nasa.gov/
See: http://www.materialstoday.com/pdfs_8_7/Opinion.pdf
See: http://www.pa.msu.edu/cmp/csc/nanotube.html
See: http://www.umich.edu/%7Eumfands/film/promise/space_travel.html
See: http://en.wikepidia.org
See: http://my.execpc.com/~culp/space/timline.html |