It isn’t only biblical figures who lived to well-seasoned ages of 900 years or more. Ancient texts from many cultures have listed life spans most modern people find simply and literally unbelievable. Some say it’s due to misunderstandings in the translation process, or that the numbers have symbolic meaning—but against the many explanations are also counterarguments that leave the historian wondering whether the human lifespan has actually decreased so significantly over thousands of years.
For example, one explanation is that the ancient Near East understanding of a year could be different than our concept of a year today. Perhaps a year meant an orbit of the moon (a month) instead of an orbit of the sun (12 months).