What if the gals are 900 years old too???
Look, at the time the story of Methusela was being told, other cutures, surrounding the Hebrews, were also telling stories about fabulously old people. When today's archiologists and translators finally got down to the nitty-gritty, they discovered that this age inflation was due to a completely different way of calculation.
I come from a family of very longer livers. I have NO desire to live forever, and am not crazy about living to be 95, either.