UFO's-
mmmm..don't know, the Bible/Torah does not mention them?, and so, there aren't any?
I think, it's more of secret military weapons...and/or intelligence agencies (for several reasons).
Bigfoot & Nessie-
Well, quite possible! I think, there are many animals out there, that we have not discovered, in fact, if you want to see bigfoot, go to Africa, hundreds of millions over there
Angels-
I believe that Angels are NOT humans! There is a very big difference between human souls, and angels
Nostradamus-
Many of his "prophecies" were based on astrology, which is STRICLY forbidden in the Torah and Bible, therefore false