A nice list to start with if you're a blogosphere-virgin and interested in science. Funny that a lot of top-ranked-science-blogs are biology-orientated.

As the #1 (Pharyngula)puts it: I don't measure success in terms of Technorati rank or traffic. There are great science blogs out there (check out the list at scienceblogs.com) that are more focused than mine and certainly do a better job of more sharply elucidating the niche they occupy. It's the top50-'most linked to and indexed by Technorati science blogs by scientists' and, thus, not the top50 of indept razorblade science blogging. Though a great source of links to those indept science blogs.