The average person lives a Lifespan from around 0-80 sequentially. Spanners don't. Some live their lives in reverse. Some come alive for a single day every ten years. Some like our hero, Dr. Adam Parr - are immortal.
2010
1953
2019
2020
1988
2017
2008
1975
1991
2016
2006
2014
1993
1978
2003
2013
1999