Probably common knowledge and not something I learned today but talking of wikipedia, if you click the first hyperlink on any article and keep clicking the first link on each result page, you pretty much always end up on Philosophy
I think it has to be the first hyperlink that isn't in brackets or the phonetic pronunciation otherwise you end up in a circle about Latin, Greek and Language I think, which in itself is quite interesting.
Probably common knowledge and not something I learned today but talking of wikipedia, if you click the first hyperlink on any article and keep clicking the first link on each result page, you pretty much always end up on Philosophy