OK, so I do a new degree (so that I can talk to clever people). I'm 65 - not as nimble mentally as most mathematicians and cosmologists. I'll probably be dead i

OK, so I do a new degree (so that I can talk to clever people). I'm 65 - not as nimble mentally as most mathematicians and cosmologists. I'll probably be dead in 10 years, so I'm not going to be doing interesting research. I would like to be able to understand what experts think is how the Universe works. I think it's a duty on people to try to understand the world they live in; same as I think a citizen has a duty to try to understand government policy, even if they are not experts in political economy or whatever. So I live in a town with a couple of good universities. I have an batchelor's degree in Philosophy. I did maths and advanced maths at 16, but bailed out after that. Surprisingly I got top grade in advanved maths, and bottom (pass) grade in regular maths. I doubt I'd get a place on a postgrad course in anything but Philosophy, and I got a poor grade in that (I think partly because of my option choices). Which degree course should I sign-up for? I'm interested in number theory, logic, and cosmology. I'd particularly like to be able to talk to people about cosmology. I don't need a first or anything; I'd only be doing it to educate myself.