A new study claims to settle the dispute.
There are plenty of studies, but drawing conclusions from them is not that straightforward.
Study investigates whether a decrease in serious childhood disease could be extending human lifespan.
What are the oldest living animals on the planet?
Britain's longest-reigning monarch has seen a big rise in life expectancy since her birth in 1926.
You can't do much about the genes you're dealt, but the BELFAST study of nonagenarians shows that you can live a long and healthy life if you play your cards well.
Prehistoric grandmothers helping out with the kids may have led to a surplus of older men competing for a comparatively small number of young, fertile women. Could this have created long-term couples?