The
Bad Astronomy blog is written by Phil Plait and published by Discover Magazine. Through the blog, Phil Plait discusses science, and he also takes on bad science.
Here Penn and Teller discuss vaccination. Well, Teller doesn't say much.
In this article, Plait discusses how photons from an exploding cruise missile can set a plane on fire. The article includes cool pictures of things exploding.
Lots of interesting stuff. I've subscribed to the e-mail feed for a few years.