Onlinecollege.org has compiled a list of 50 science blogs that can be enjoyed by anyone regardless of background.
They are not in order of 'best' 1 to 50 but rather are broken down into categories. Under the News grouping ScienceCodex is featured along with National Geographic, Wired and Discovery.
Onlinecollege.orgScientific Blogging ia highlighted in All Science group along with the NY Times' John Tierney, though out of place (for that group) culture and evolution sites like Panda's Thumb are also in there rather than biological sciences or policy. In physical science, perennial favorite Bad Astronomy gets some attention as well, but the real finds were some good sites in Environment and Policy.
Go check it out - 50 Excellent Science Blogs Anyone Can Appreciate.