I was doing some Japanese reading practice and noticed a couple sentences that began with ある.
あるところに男がいました。
ある夜、男の家におじいさんが来ました。
What does the ある mean in this case? I haven’t learned this. Also, can someone point me to the chapter in Tae Kim that talks about this, assuming there is one?
Well, as @Leebo said they’re etymologically related, yes. But I mostly mentioned it because the OP seemed most surprised by seeing a verb at the start of a sentence, figured that by extension they were surprised to see it in front of nouns as well.