Right , today no one lives 600 years. According to Genesis if Adam had not disobeyed he could have lived forever right here on earth. After human imperfection entered the picture because of Adam's disobedience mankind could only live up to 1000 years or a thousand-year day. Even the oldest person recorded did not make it quite to 1000 years. After the Flood man's age dropped greatly. Revelation climaxes with the return of living forever on earth for the majority of mankind because through divine intervention Jesus will rid the earth of war, food shortages, sickness and even death.
This peace on earth will be for men of goodwill.
(Psalms 37:11,29,38; 92:7; Proverbs 2:21,22; 10:30)
Do I need to do this to you again? Sigh...
Genesis 3:
21 The LORD God made garments of skin for Adam and his wife and clothed them.
22 And the LORD God said, "The man has now become like one of us, knowing good and evil.
He must not be allowed to reach out his hand and take also from the tree of life and eat, and live forever." 23 So the LORD God banished him from the Garden of Eden to work the ground from which he had been taken.
24 After he drove the man out, he placed on the east side [
e] of the Garden of Eden cherubim and a flaming sword flashing back and forth to guard the way to the tree of life.
That spot I bolded and underlined, it says that if he ate from the tree of life (which he didn't) THEN he would be immortal. Nowhere does it say he would only live to be 1000 years old. Infact in Genesis 6 says that man would only live to be 120 years old.
It seems that using the Bible (which you seem confused about) doesn't really work to defend your point. You could try, I dunno science.