Book of Enoch : 80 - 2
And in the days of the sinners the years shall be shortened,
And their seed shall be tardy on their lands and fields,
And all things on the earth shall alter,
And shall not appear in their time:
And the rain shall be kept back
And the heaven shall withhold (it).
Within the outer waking reality we are reliant upon human "history" and the ever present "knowledge", the human logical mind has been conditioned repeatedly and incessantly to look for and store said history and knowledge. It is not TRUTH to assume that when the flood happened that humans were created in our Creator YHWY's image and that suddenly everything was perfect. The God of the world that we are born into at a physical level is Lucifer and his "creation" is merely a copy of that which our Creator YHWY had created. As with all copies and refinements to said copies they are off, much like a photocopier will produce copies that are not as crisp as the original, so too does Lucifer's world. There is much that is written and presented by "science" that seeks to explain the anomalies within humanity but they are placed there only to satisfy the human logical mind. Man has taken "creation" apart and attempted to alter and refine it.
It must be noted that all that is spiritual will manifest in the physical realm for they are linked and Lucifer has simply presented a very logical argument for the state of humanity at this time. The human race are not purely human, they have been hybridized but not in ways that the conspiracy theories would have us believe, We are part Nephilim, part human for that is the "original" that Lucifer used. Of course many within humanity would dispute this but their arguments place "fact" in a context that is already provided for humanity, their own "history".
In order to fully place the book of Genesis in context the Book of Enoch must be understood with the aid of the Holy Spirit for like the Word of YHWY the Book of Enoch is not a book simply to be studied and digested. It is written to be read with the eyes of the Holy Spirit and not purely logical, human interpretation. Without placing Genesis in the correct context the entire Word of YHWY is out of context, much like a ship setting sail, one degree of being off course produces a course that takes the entire ship completely off course.
Proverbs 3:5 - 10 (KJV)
Trust in the Lord with all thine heart; and lean not unto thine own understanding. In all thy ways acknowledge him, and he shall direct thy paths. Be not wise in thine own eyes: fear the Lord, and depart from evil. It shall be health to thy navel, and marrow to thy bones. Honour the Lord with thy substance, and with the firstfruits of all thine increase: So shall thy barns be filled with plenty, and thy presses shall burst out with new wine.