P.s It is also mentioned in the bible that people lived hundreds of years before the great flood. This is also possible. It is believed by some that the earth was once enveloped in layer of very thick clouds or water. This would have shielded people from solar radiation much better then our ozone layer does today. Also just because it mentions in the bible how many years people lived still doesnt mean that those years were also Gods years because of course those people lived on earth. Were many species made extinct because a giant astroid hit the planet? It is possible that the astroid is what destroyed the original atmospere. It is possible that every thing in the bible can coincide with large destructive events discovered by science. Even the parting of the red sea.