What is the … explanation for the Bible saying people lived hundreds of years, even up to 900 years?
I’ve read that genetics changed, but I find it really hard to believe people ever lived that long.
Adam and Eve were created to live forever (conditionally), and had much vitality.
However, we see a change. Cast out of the Garden. Curse upon the ground, blood of Abel, and then the flood.
The answer is found in several things. Global change of atmosphere (oxygen, air pressure, etc), geological (upheaval, complete change), arboreal (trees having to start), vulcanism (gas clouds, lava, ash), weather (cold, ice due to particulates in atmosphere), due to the global flood.
However, God also says something key in Genesis 9:5. God (temporarily and with restrictions) gave mankind
flesh of clean beast, which would shorten man’s life. Study the ages before the flood (exclude Enoch), and then just after the flood, and then a generation or two after, unto Moses (120).