Hello Physics Forums. INFO-MAN here. I don't know if you guys are aware of this or not, but the internet is generally not a safe place to have a serious discussion about anything, let alone a subject like physics, or really anything even remotely scientific. This, however, seems like a good place to discuss scientific subjects in a respectful and hopefully productive way. I am looking forward to getting to know the community here, and joining in where I think I might be able to make a useful contribution. I am a mechanical designer/engineer, and I work with an ecclectic team of scientists and engineers who build highly specialized social robots for use in research at universities around the world. I briefly went to medical school (2 years) before largely regaining my sanity. The subjects I especially enjoy are physics, biology, and psychology. Thanks. EDIT --- I have just been informed that I have won some sort of trophy just for saying hello. My, this is a friendly place!