Britain’s Ben Goldacre is a medical doctor who has written the weekly Bad Science column in the Guardian since 2003.
He examines the claims of scaremongering journalists, quack health products, pseudoscientifc cosmetics adverts, and evil multinational pharmaceutical corporations.
I especially like that he fairly takes on both sides of that issue–you researchers out there will be very interested in his take on how pharmaceutical studies that show results unfavorable to their funders tend not to get published (search for the SSRI v. placebo bit in the post).
The blog is very funny, though it’s disturbing to see what passes for evidence in Britain’s tabloid press. Things aren’t much better over here, particularly when it comes to issues like climate change. And of course “natural channel design!”