Why did the patriarchs live so long?

Another answer from our community:

Because God had created a world in which conditions were optimized for human beings. For example,

-The atmosphere was much denser with a very much higher water-vapor content. This absorbed a lot of the harmful radiation that today strikes the earth and of course, human beings as well. This meant people's DNA was NOT damaged or deteriorated as much as today.

-The DNA itself was purer and not corrupted compared with today. It's like breeding purebred animals: the more generations away from the original parents, the more DNA defects, health problems, and weaknesses. Man has degenerated with time, not improved.

- Men and women were bigger and stronger physically, and more superior intellectually with bigger brains than today.

- There was a higher Oxygen content in the atmosphere. This meant people lived longer and healed faster and had more energy. (This has been proved by hospitals keeping patients in a pressurized and high-Oxygen-content room finding they recover from surgical operations and bad burns where normally they would die .)

- You are what you eat: their food was purer and cleaner without the defects and diseases so common today, and chemical sprays etc were not required and were not used and ingested as today.