You learn something new everday at Perlmonks. I didn't know what a Golden ratio and had to look it up at Wikipedia

Yep, maybe it's just me because I know the Golden Ratio by heart to twelve decimal digits (basically, those a pocket calculator gives you) since... I don't even remember when: and I didn't sat down trying to learn it; I just "had" to type it here and there somewhere in the past, and it stuck.