If you would like to see a new badge/membership type added just send an email to CR4 Admin and, if you can, include an image that you'd like me to use for the badge. (We can resize them for you. Do not send copyrighted images.)
I'm particularly interested in nonlinear physics, quantum mechanics, relativity (Jorrie is the local CR4 expert, do yourself a favor and read his blog), and the standard model (quarks, etc.).