The Turin Shroud
Dendrochronology A good site explaining all about dendrochronology and how it is used as a dating tool:
These two sites explain some of the work at Bristol University involving x-ray diffraction.
A more in depth discussion: http://www.dal.ca/~digs/tl1.htm
New Scientist magazine: www.newscientist.com
The Royal Society of Chemistry: www.rsc.org
General website covering many areas of chemistry: http://chemistry.about.com
Answers to any of your science questions: www.madsci.org