Hello. Here is a quick summary, made brief only so I don't write up an autobiography. I am 31-years-old, with an undergraduate degree in Philosophy and Computer Science. I took no physics courses in my course work. Since last summer I have been independently studying physics and calculus out of the textbooks used by MIT's courses. I have a very strong desire to change the direction of my life. My long-term goal is graduate school, and eventually a PhD. I realize it's a little late for me to be making this decision. And that's where I need some advice. Since I already have an undergraduate degree, I'm wondering what it would take to give me a reasonable chance at being admitted to a graduate program. I don't think most universities let you start a new degree if you already have one. But it's ridiculous to think I could take graduate courses without taking undergraduate physics classes first. So, to summarize, I'm 31, I'm studying physics independently, and I want to aim for graduate school. Is this hopeless, or is this situation more common than I assume it is? Thanks.