How do you study something you can't see? Dr. Ghez tells the story of how scientists have found black holes.; Further reading: Science. New Series, Vol. 300, No. 5627 (Jun. 20, 2003), pp. 1898-1903
Dr. Kirshner presents 15 billion years of cosmic evolution in 25 minutes.; Further reading: http://opac.amphilsoc.org/cgi-bin/koha/opac-detail.pl?biblionumber=220484