Murihiku wrote:
Wow, how long is too long? I've been thinking of entering molecular biology again, but it's been 8 years since I last studied it.
And that, dear sir, is entirely your fault.

7 years is the cut-off (it varies by university). I am going for another Master's, but three of the pre-requisites (all of which I have taken before for my first BS degree) are just outside of the window.
BTW, I blame you for rising tuition costs.
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"The surest way to corrupt a youth is to instruct him to hold in higher esteem those who think alike than those who think differently" -Nietzsche