The geneologies given in the Old and New Testaments bring the timeline from Adam to Jesus. From there it has easily been figured from there to present by many scholars. The timeline from Adam to present does not, of necessity, appear to be in conflict with other views but only becomes an issue when prehistoric relics predating the Adamic timeframe are brought into the equation which brings us to the second issue.
The second issue in dispute, however, is the length of time from when God first said, 'Let there be...' to the time He created Adam. The scientific evidences surrounding the existence of Pleochroic Halos would suggest that the cosmos (earth included) was created instantaneously at the same moment in time. However, this is not without the problem in that it doesnot explain how, if, indeed, everything was created all at once, say, six thousand years ago plus one (creation) week the light from stars billions of light years away have, in that short six thousand years, managed to already reach earth.
Satan was and still is (for now) the most powerful being ever created; Jesus being excluded from this equation as He has always been a part of The Godhead which always has been without beginning or end. Nothing in Scripture specifically speaks to nor excludes the possibility that, at any time, he had even limited creative capabilities; anything in this regard must be considered when weighing Scripture with scientific fact.
God is perfect and anything and everything He has ever done is and always has always been perfect and good, only the aftermath of sin has caused His efforts to be despoiled. God and His scriptures do not lie, therefore, the answers must lie, agreeably, somewhere in between the scriptures and the scientific and archeological evidences found today.
Scientifically speaking, light does not a day make without the revolving of the earth around the sun and, yet, the sun and the moon were not created until the fourth day. That being the case, we must take a closer look between "In the Beginning..." and the fourth day.
If everything God does is right the first time then something happened in between Genesis 1:1 when God perfectly created the heaven and the earth and Genesis 1:2 when everything became tohu va bohu (chaotic and confused) i.e. without form and void. Enter the Gap Theory.
I find considerable merit in the reasoning of Christian physicist, Lambert Dolphin, when he posits that when Satan rebelled all of the cosmic creation was damaged by sin, thus we see the winding down of the universe, climactic and climatic upheavals, etc; also, there is scriptural merit in the fact that when Adam sinned all of the natural order of creation was damaged by sin as well and is evidenced in sin, sickness and death.
Therre are, literally, countless references between Genesis and Revelation involving the numerous eruptions past and future of Satan's Nephilm; these could very easily explain much of the otherwise unexplainable archeological evidences humanism's evolutionary scientists hve to date only been able to posit as unmerited missing l;inks to the human chain predating Adam.
This, when taken in tandem with relics such as dinosaur remains, brings us to the indeterminate period of time in between Genesis 1:1 and 1:2; if Satan did possess some limited creative abilities then his rebellion could very well have gone from merely sinful thinking in his heart those infamous words, "I will ascend into heaven, I will exalt my throne above the stars of God... I will be like the most High" to one of actual sinful rebellious actions which could easily have been the impetus needed to persuade the one third of the heavenly host to follow him.
It would appear that Satan, the most powerfully created being designed as guardian and protector of The Throne itself became jealous when it was discovered than "lowly' mortal man was to be created to rule over all, himself included, and not he and, which, then, necessitated a recreation supplanting Satan's earlier creative attempts.
This may or may not be an accurate rendering of what could have transpired; at the very least, it does offer to lay to rest many of the hithertofore contradictions presently existent between the scriptures and the scientific evidences and its archeological record.
The scary part in all of this is the issue of the future release of the fallen angels temporarilly locked in chains of everlasting darkness that spawned the Nephilim and that will in the end times be released to once again spawn anew. Combined with modern day cloping knowledge which seems inconceivable to possess the ability to impart God's breath of life to create a living soul then the trapped in the earthly realm demonic spirits of the previously dead nephilim (referred to as demons) then there does exist life forces for those clones as well as new Nephilim that the scriptures seem to infer are irresistable to mankind's fairer half.
I find it unlikely than the full power and numbers of The Lord's Army would be needed to quell a worldwide Armageddon involving a battling of the world's military forces but the sudden spread and destructive might of the Nephilim and their progenitors, the fallen angels, would be a might the world's collective armed forces would be incapable of coming against and would, indeed, require the help of the Army of God.