Related: best engineering blogs

1. Curious Cat Science and Engineering Blog - Focused on science and engineering: education, research, economics, gadgets and innovation.
2. Science Blogs - Huge collection of excellent science bloggers brought to you by Seed Magazine.
3. Bad Science - Blog by a British M.D., Ben Goldacre, that exposes bad science and bad science reporting. The blog also does a good job of helping increase your scientific literacy.

Also see blog posts about science on the Curious Cat Science Blog including: 20 Scientists Who Have Helped Shape Our World - Science Webcast Directory - Invest in Science for a Strong Economy - Parasite Rex