Sciencedaily.com — This excellent resource covers energy, bacteria, nuclear energy, physics, astronomy, Space and time, chemistry, nanotechnology, quantum physics and lots more. This is probably one of the best on our list and a resource that covers everything related to science.
Scitable — This science website is where you can learn pretty much everything you will ever need to know about science. You can read the blog, talk to other people, groups and even apply for jobs.