That's only seven thousand year history. This planet and human existence is much longer.
The bible is tracking years according to the descendants of Seth. Cain's descendants are not tracked by years. But, they are shown to be very different in this quote from the bible.
Genesis 6New American Standard Bible (NASB)
The Corruption of Mankind
6 Now it came about, when men began to multiply on the face of the land, and daughters were born to them, 2 that the sons of God saw that the daughters of men were [a]beautiful; and they took wives for themselves, whomever they chose. 3 Then the Lord said, “My Spirit shall not strive with man forever, [c]because he also is flesh; [d]nevertheless his days shall be one hundred and twenty years.” 4 The Nephilim were on the earth in those days, and also afterward, when the sons of God came in to the daughters of men, and they bore children to them.
In verse 2 above the sons of God are referring to the descendants of Seth. The daughters of men are the descendants of Cain. Cain descendants are different than Seth's descendants because, Cain was made a wanderer of the earth when he killed Abel as stated in the following.
GEN4:10 He said, “What have you done? The voice of your brother’s blood is crying to Me from the ground. 11 Now you are cursed from the ground, which has opened its mouth to receive your brother’s blood from your hand. 12 When you cultivate the ground, it will no longer yield its strength to you; you will be a vagrant and a wanderer on the earth.” 13 Cain said to the Lord, “My punishment is too great to bear! 14 Behold, You have driven me this day from the face of the ground; and from Your face I will be hidden, and I will be a vagrant and a wanderer on the earth, and whoever finds me will kill me.”
Cain's descendants are given credit for starting cities on earth, and Seth's aren't. I would suggest that a year to a descendant of Seth is different to a year according to a descendant of Cain. Seth's descendants were not made wanders of the earth, Cain's were. We don't even know if Seth's descendants were confined to the Earth. The bible does say (GEN 6 above) the Nephilum or Seth's descendants came to the earth right before the flood, and some lived on it afterward(Noah and his descendants).
A year to Seth could have been an astrological age or 25,920 years(or some other clock Seth was using). Cain's years are not tracked in the bible, but we know he lived on earth, so I think we can assume, he measured time the way we do now. It appears that the flood changed it so the only surviving descendants of Seth(Noah's family) would now be held to the same time measurements and lifespans as Cains descendants, as stated in Gen6 in the first bible quote
GEN6:3 Then the Lord said, “My Spirit shall not strive with man forever, [c]because he also is flesh; [d]nevertheless his days shall be one hundred and twenty years.”
So, if you want to take the bible very literally, that would mean Adam and Eve existed (7,000 years)x(25,920 years in a astrological age)=181,440,000 years, and the first person to for sure live on Earth was Cain (and we don't have a record in the bible of how long ago that was.) But, we do have a fossil record, and it says about 200,000 years ago. There are people(some pretty whacky, and some that at least should be considered) claiming they have evidence of human civilizations as old as 120 million years. I suggest the flood is an event that dramatically changed things, and is probably marked in the fossil record as the end of the last ice age 10,000 years ago.