Is it possible for a person to live to beyond 80 or 90 years old?

Yes! While historically, some people lived or now live to over 100 years old, the median age at death in the 1800s was between 40-50 years of age. In the 1900s, with advances in medicine and discovery of bacteria and antibiotics, the median age at death doubled, to at least 80 years old. Today it is much more common for most people to live to 80, 90, or even over 100 years old.