All nature is subject to the second law of thermodynamics. And that includes physically living things. Even the lowly amoeba which cannot die except by outside influence (is not subject to programmed cell death aka apoptosis) must pay the thermodynamic tab by dissipating heat into the local environment, i.e. metabolism or in information theory the reduction of uncertainty in the molecular machine as it moves from a before state to an after state (Shannon, Schneider et al.)
In my view, Adam and therefore his offspring once banished to mortality retained their supernatural being as compared to strictly natural beings and therefore the patriarchs lived exceptionally long lives. That is, they lived long lives until the Noah flood when all such beings were destroyed and the only surviving Adamic men (Noah and family) were cursed to shorter lives.
Or to put it another way, I perceive God's judgment in the Noah flood was targeted to the watcher-angels, their offspring and Adamic man whom they had corrupted - and everything else they corrupted on the earth.
And Jehovah saith, `My Spirit doth not strive in man -- to the age; in their erring they [are] flesh:' and his days have been an hundred and twenty years.
The fallen ones were in the earth in those days, and even afterwards when sons of God come in unto daughters of men, and they have borne to them -- they [are] the heroes, who, from of old, [are] the men of name.
And Jehovah seeth that abundant [is] the wickedness of man in the earth, and every imagination of the thoughts of his heart only evil all the day; and Jehovah repenteth that He hath made man in the earth, and He grieveth Himself -- unto His heart.
And Jehovah saith, `I wipe away man whom I have prepared from off the face of the ground, from man unto beast, unto creeping thing, and unto fowl of the heavens, for I have repented that I have made them.' - Genesis 6:1-7 (Young's literal translation)
Since the damage was far too excessive and did not show signs of military or human involvement, he argued that repeated earthquakes might have been responsible for these events. At the time he published, Schaeffer was not taken seriously by the world of archaeology. Since then, however, natural scientists have found widespread and unambiguous evidence for abrupt climate change, sudden sea level changes, catastrophic inundations, widespread seismic activity and evidence for massive volcanic activity at several periods since the last Ice Age, but particularly at around 2200BC, give or take 200 years.
Areas such as the Sahara, or around the Dead Sea, were once farmed but became deserts. Tree rings show disastrous growth conditions at c 2350BC, while sediment cores from lakes and rivers in Europe and Africa show a catastrophic drop in water levels at this time. In Mesopotamia, vast areas of land appear to have been devastated, inundated, or totally burned...
Even if they knew it existed, they could not know its true antiquity which was recently confirmed by a copy being found in the Dead Sea Scrolls in the 1940s. The book, and therefore its insight, was banned and removed by the Church for over a thousand years even though Justin Martyr, Athenagoras, Tatian, Irenaeus, Clement of Alexandria, Tertullian, Origen and others accepted it.
But everything happens according to God's will and timing, including when we are to know what:
In the physical world everything is contingent. Nothing occupies the same time and place beyond the instance. Atoms, sub-atoms, planets solar systems, galaxies are all moving in many directions at the same time and are in a state of decay the moment they exist.
“A flood targeted to destroy Adamic men and watcher angels...”
Spirited: Let us add to this list those grotesque part human—part reptile, bird, beast beings somehow created by the fallen angels. The flood targeted them by way of disembodiment.
Though their bodies died the demons occupying them live on-—right here, all around us as spirit guides calling themselves everything from Neale Donald Walsh’s God to powerful New Age insider Barbara Marx Hubbard’s Jesus.
As for the fallen angels, they too are here, posing as extraterrestrials, Transcended Masters, the Council of Nine, and the Space Brothers.