Ben Goldacre's "Bad Science" blog

Ben Goldacre is a medical Doctor who recently published a book on bad science (see Telegraph review here)

His blog is dedicated to debunking bad science stories, poor statistics and most importantly, challenging media hysteria on subjects such as climate change, creationism, homeopathy, nutritionists such as Gillian McKeith, MMR etc. It is an excellent blog, usually just reproducing his own Guardian column but for champions of good science, it is an invaluable resource.

http://www.badscience.net/