it is a fact, but how it is done is not since theories aren't fully accepted. Big bang is the origin of all... if thats the start i guess it matters to evolution. ( althought i know what you mean :P )

and hyde it's in debate if we should learn or not, i don't know anything in detail on those issues since it doesn't interest me and i don't remmember, but if we should learn or not... we should.

Offtopic:

Could you help me with the theory word?, when i mean the "one theory"... well thats not what i really want to say but my english is limited.