As we come to rely more on the web as a research and reference tool it's important that references to other works from a web page remain constant. But visit any old research web site and chances are half the pages it refers to will result in a "404 Not Found". An article in Nature called The trouble with reference rot highlights the issues involved. Recommended. This article was brought to my attention by my colleague Mark Wilson.
from The Universal Machine http://universal-machine.blogspot.com/