Matthew 24:36 it says but on that day and hour no one knows not even the angels of heaven nor the Son, but the Father alone. For the coming of the son of man will be just like the days of Noah, for as in those days before the flood they were eating and drinking marrying and giving in marriage until the day that Noah entered the ark, and they did not understand until the flood came and took them all away; so will be the coming of the son of man be.

Genesis 6 talks of the Nephelim as great men of renown, would that be the demi-Gods of Ancient Greece and that region, the deities raised up and worshiped, followed and put forward like Goliath for the Philistines. Archeology once again backs up the Bible with giant skeletons being found in many places.