[p_h]

I've had multiple math professors tell me to study as much math as I can while I'm young, because once you're over 30 it's a lot harder to learn math. I'm in my 20's so I'm not sure if this is true.

It also seems to me that the math you would learn in an O'Reilly book isn't in depth enough to contribute to research.

[b_emery]

Im in my 40s and still learning plenty of math. I think it's more a function of focused practice than age. I've also seen several profs doing good work well into their 80's so I dont know what your profs are talking about!

[contextfree]

I think a lot of "it's much harder to learn X when you're older" (languages for example) is more about not caring as much or not having as much time than it is about having less ability to learn given those things. At least I hope so, since I'm rapidly approaching 30 and there are vast and deep realms of knowledge I'd like to explore but am just getting started now. =)

[Estragon]

My research concerns the genetic epidemiology of heart disease. The mathematics involved is not that deep.