Did you know that there is an age 105+ category in cycling? Today Robert Marchand made a world record for the distance traveled by bike inside an hour in his age category. He went over 22 km. (Hm...How many cyclists are in THAT category??)
Here's a list of the best and unique accomplishments of people in the oldest age brackets of their fields: academic work, sports, trades, birthing, and entertainment. I am sure there are other similarly notable people and feats, but this one alone is revealing enough about what can be done while we're alive. It's never too late to try something new or excel at a specialty.