The perception of old age also seems to be tied to retirement age, which varies between countries. In Germany, for example, the retirement age is gradually increasing and is set to reach 67 by 2031.

Explore the emerging science of healthspan in other stories in this special report.

Archbishop Vincenzo Paglia spoke of the pope’s age and health during the Pontifical Academy for Life’s first Vatican ...

The old-age pension, which is based on the “three-pillar” system, is one of Switzerland’s greatest achievements. It underlines the sense of solidarity between the generations that is firmly rooted in ...

The British black and brown cat's elderly age of 26 is equivalent to approximately 120 human years Skyler Caruso is a Writer and Reporter of PEOPLE Digital Entertainment. She joined PEOPLE in 2021 ...