Isaiah 23:13
Behold the land of the Chaldeans; this people was not, till the Assyrian founded it for them that dwell in the wilderness: they set up the towers thereof, they raised up the palaces thereof; and he brought it to ruin.
AV - Chaldean 1; 1
3679 Kacday { kas-dah'-ee}  (Aramaic)
for 3778;; adj patr
GK - 10361 { yD;s]K'
Chaldean = see Chaldea "clod-breakers"
1) a race of people usually associated with the area around Babylonia
2)   the learned class of priests, magicians, or astronomers1
3778 Kasdiy { kas-dee'} 
1) a territory in lower Mesopotamia bordering on the Persian Gulf
n pr m
2) the inhabitants of Chaldea, living on the lower Euphrates and Tigris
3)   those persons considered the wisest in the land 
If this was a people who was not, what were they? They were undoubtedly spirit beings. The Strong's concordance says the Chaldeans are professional astrologers. An astrologer in Isaiah 23:13 refers to these astrologers as relating to something lofty, sky or celestial bodies or their abode. The Chaldeans were people who were not. What does that tell us? It tells us they were not human, they were spiritual entities. If you study all the scriptures concerning the Chaldeans, you will find they are ministering to Satan or performing his work. Did they take on human bodies? 
Jeremiah 33:5
They come to fight with the Chaldeans, but it is to fill them with the dead bodies of men, whom I have slain in mine anger and in my fury, and for all whose wickedness I have hid my face from this city.
Book of Enoch
[Chapter 17]
1 And they took and brought me to a place in which those who were there were like flaming fire, 2 and, when they wished, they appeared as men.
The Book of Daniel gives another clue to the position of the chaldeans. It is fairly evident from these passages that these Chaldeans are not God's people. The god they had was the Assyrian who had made a place on earth for them,  whether in or out of the flesh. They had much power because they could have told of the king's dream. They were astrologer's or in some sense of the word, space travelers. 
If you were to study the ancient Sumerians, their history and writings, it is very apparent these are one and the same. They appeared on the scene around 6,000 years ago, probably builders of the pyramids.
Daniel 2:10,11
The Chaldeans answered before the king, and said, There is not a man upon the earth that can shew the king's matter: therefore there is no king, lord, nor ruler, that asked such things at any magician, or astrologer, or Chaldean. And it is a rare thing that the king requireth, and there is none other that can shew it before the king, except the gods, whose dwelling is not with flesh.
I Corinthians 15:44 
It is sown a natural body; it is raised a spiritual body. There is a natural body, and there is a spiritual body.
Did  the Chaldeans take the dead bodies of men for their purpose? This could also elude to the ones who take the mark of the beast in Revelation. These bodies will be taken by the fallen angels who are kicked out of heaven with Satan. I think this is the same situation. Why is it that anyone who takes the mark of the beast can't be saved?  And the third angel followed them, saying with a loud voice, If any man worship the beast and his image, and receive his mark in his forehead, or in his hand, The same shall drink of the wine of the wrath of God, which is poured out without mixture into the cup of his indignation; and he shall be tormented with fire and brimstone in the presence of the holy angels, and in the presence of the Lamb: And the smoke of their torment ascendeth up for ever and ever: and they have no rest day nor night, who worship the beast and his image, and whosoever receiveth the mark of his name.  They are the children of Satan. The church will be dealt with, the Jews will be dealt with, so they will be the only ones left. The few who do not take the mark of the beast will be slain and also receive salvation. And I saw as it were a sea of glass mingled with fire: and them that had gotten the victory over the beast, and over his image, and over his mark, and over the number of his name, stand on the sea of glass, having the harps of God.   
A spirit cannot be taken by human hands, II Samuel 23 verse 6. "But the sons of Belial shall be all of them as thorns thrust away, because they cannot be taken with hands:"  The only way a spirit can be held is in a body or physical state, thus they suffer forever and cannot return to their place of abode. 
We often wonder why God says that the ones who do not enter the kingdom of heaven must suffer forever in the pit. This is why. If they are released from that physical body, they are free to infect the universe again with their satanistic and rebellious ways. We also must ask, are there other types or kinds of bodies? The Bible indicates there is. If this is not enough evidence, let's go on to the new testament.
I Corinthians 15:39,40 
All flesh is not the same flesh: but there is one kind of flesh of men, another flesh of beasts, another of fishes, and another of birds. There are also celestial bodies, and bodies terrestrial: but the glory of the celestial is one, and the glory of the terrestrial is another. 
The word, "bodies", here means delivers or protectors. Thus we see it is talking about many types of beings who protect us such as Angelic beings. It also mentions them as having a body, although maybe not flesh as we know it. These inhabitants of the heavenlies are many types of angelic beings, i.e. 'Host of Heaven'.
Who is this Assyrian who founded this place for these fallen angelic (chaldean) beings? The Assyrian is commonly referred to in the old testament. He is the devil, Satan or the Antichrist. He is the true form of evil. If Satan founded it for them that dwell in the wilderness, who are these? They are his followers who were kicked out of Heaven when they followed Satan. They inhabited the land of Ur in the Bible. This is the same land God called Abram and his wife Sarai out of. And Terah took Abram his son, and Lot the son of Haran his son's son, and Sarai his daughter in law, his son Abram's wife; and they went forth with them from Ur of the Chaldees, to go into the land of Canaan; and they came unto Haran, and dwelt there.  
Incredibly, the Bible explains where Satan currently resides, and connects him with forces in the atmosphere. . . Paul says we wrestle not only with flesh and blood, but with principalities and powers, with wicked spirits in high places, literally, "in the heavens" "in the aerial regions" Eph.6:12. Hence Satan is called "the prince of the power of the air" "the prince of the aerial host" Eph.2:2. The Satanic confederation has its seat in the atmospheric heaven in the spaces above and around our world. This fundamental of scripture contradicts many traditional concepts of "hell" as the domain of the devil and his minions . King David recognized this fully when he wrote: 
For who in the sky (the atmosphere), shall be ranked with Jehovah, who among the sons of the mighty is like Jehovah? Psalm 89:6
Satan's residence was invaded by God, restricting him to a specific realm.
Ezekiel 28:12,19
Son of man, take up a lamentation upon the king of Tyrus, (Satan) and say unto him, Thus saith the Lord GOD; Thou sealest up the sum, full of wisdom, and perfect in beauty. Thou hast been in Eden the garden of God; every precious (heavenly) stone (planets or stars) was thy covering, the sardius, topaz, and the diamond, the beryl, the onyx, and the jasper, the sapphire, the emerald, and the carbuncle, and gold: the workmanship of thy tabrets and of thy pipes was prepared in thee in the day that thou wast created. Thou art the anointed cherub that covereth; and I have set thee so: thou wast upon the holy mountain of God; thou hast walked up and down in the midst of the stones of fire (planets). Thou wast perfect in thy ways from the day that thou wast created, till iniquity was found in thee.By the multitude of thy merchandise they have filled the midst of thee with violence, and thou hast sinned: therefore I will cast thee as profane out of the mountain of God: and I will destroy thee (from a planet between Mars and Jupiter), O covering cherub, from the midst of the stones of fire. Thine heart was lifted up because of thy beauty, thou hast corrupted thy wisdom by reason of thy brightness: I will cast thee to the ground, I will lay thee before kings, that they may behold thee. Thou hast defiled thy sanctuaries by the multitude of thine iniquities, by the iniquity of thy traffic; therefore will I bring forth a fire from the midst of thee, it shall devour thee, and I will bring thee to ashes upon the earth in the sight of all them that behold thee. All they that know thee among the people shall be astonished at thee: thou shalt be a terror, and never shalt thou be any more.
Obadiah 1:3,4 
The pride of thine heart hath deceived thee, thou that dwellest in the clefts of the rock, whose habitation is high; that saith in his heart, Who shall bring me down to the ground? Though thou exalt thyself as the eagle, and though thou set thy nest among the stars, thence will I bring thee down, saith the LORD.
This allusion or reference to the master fallen angel, Satan, seems to elude to "the rock", or a particular rock. It seems like the planet that was torn apart creating the astroid belt is not as speculative some may have thought.
While the New Testament uses the Greek word "demon" to refer to these "sons of the mighty", the Old Testament uses revealing descriptive names. Words which describe these beings, such as ben Elohim, "sons of God", Zophim, "the watchers", and Malakh, "messengers", (translated angel in English), are used for the "aerial host" often regardless of alignment. New Testament demons were understandably associated with evil, since originally the Greek diamon meant "any deity", and the Bible consistently portrays only one God. The name "devil" means "opposer" and the word "satan", means "the accuser". The Bible explains that Satan and his host of fallen angels rule over this planet, it also details a hierarchy of demonic echelons. 
Jesus Christ explained to his apostles what events would immediately precede his second coming, "It shall be exactly as in the days before Noah entered the ark". Matt 24:38 , Luke 17:27. What is the significance of this statement and how does it relate to Ufos? The Flood epic Gen. 6 begins with a strange account of the "sons of God" (ben Elohim), taking wives (women) from among the daughters of Adam.
"In those days giants were in the earth, the men of renown of whom ancient tales are told".
The word which is translated, "giants", in the King James version of the Bible is, in Hebrew, "Nephilim", which means, "Those who fell, or ... the fallen ones". Jude, the brother of Jesus describes them as "angels, having left their first estate in heaven". These fallen angels came to earth for a serious purpose. 
Actually, the entire book of Jude is actually referring to these fallen hosts. 
Jude 1:12,13 
These are spots (blemishes) in your feasts of charity, when they feast with you, feeding themselves without fear: clouds they are without water, carried about of winds; trees whose fruit withereth, without fruit, twice dead, plucked up by the roots; Raging waves of the sea, foaming out their own shame; wandering stars, to whom is reserved the blackness of darkness for ever.
We see several truths here.
Carried about by winds, meaning led by spirits.
Clouds that are without water, meaning invisible.
Trees whose fruit withereth, meaning they will not go on.
Twice dead, meaning the second death is death of the soul.  Rev. 20:6
Wandering stars, who were kicked out of heaven with Lucifer.
To whom is reserved darkness, meaning eternal torment.
and so on.
These are the fruits of Cain, or the Kenites.
So, as we see here, the new testament gives great credence to these fallen angels and their future. Also refer to II Peter for the identical description of these entities. 
Isaiah 24:17
Fear, and the pit, and the snare, are upon thee, O inhabitant (Sons of God) of the earth.
Although their fate is determined, they will continue until the end.