http://web.archive.org/web/20010611130242/http://members.tripod.com/da_theoretical1/wdphysics.html Came across an interesting document that explored some of the known scientific possibilities behind this show Specifically this PDF: http://web.archive.org/web/20110717102711/http://da_theoretical1.tripod.com/techie/docs/TnSum1203.01eHwd.pdf