We social gerontologists talk about ageing and reckon a centenarian or supercentenarian to be pretty old, but when biologists talk about ageing they mean REALLY old.
I loved this sequence of oldest living things, starting with a self-cloning plant reckoned now to be 43,000 years old and ending with Galapagos tortoises, mere striplings at 150-odd years old.
I also enjoyed this Radio 4 programme about yew trees, the oldest of which they reckoned to be 5,000 years old.
I was amused that the website makes no reference to yew trees, and the Radio 4 programme made a claim for the 5,000 year old yew tree to possibly be the world's oldest living thing. I guess biologists don't always do their lit reviewing properly, just like social gerontologists.