used to watch Carl Sagan's "Cosmos" series on TV back in the 80's - ie:
more on Tesseracts and the 4th dimension here:
http://www.youtube.com/watch?v=cbprfcSVcyQ&feature=related
http://www.youtube.com/watch?v=9DoSqeJNG74&feature=related
http://www.youtube.com/watch?v=uDaKzQNlMFw&feature=related
http://www.youtube.com/watch?v=CtSNStVW81M&feature=related
and beyond:
http://www.youtube.com/watch?v=lFvUaFuv5Uw&NR=1
http://www.youtube.com/watch?v=XjsgoXvnStY&feature=related
http://www.youtube.com/watch?v=c8DwJKSn-bI&feature=related
