(CNN) — Life expectancy fell across the majority of high-income countries, signaling a collective and simultaneous decline among affluent nations for the first time in decades, a new study finds.

Some say new research has "important consequences for ageing research", while others believe the study's findings are "not ...

Two new studies have found that small improvements in day-to-day life can have substantial impacts on life expectancy.

Figures for national life expectancy by country tend to be within bandwidths. At the moment, the US is relegated to the lower end by comparison with the rest of the world, one rank above Cuba. That is ...