And why the gap may soon be closing in some countries.
Predicting life expectancy remains in the realm of science fiction, but it may soon be possible. Are we prepared for such information? And who else would benefit from this knowledge?
Running once a week, or for 50 minutes a week, significantly improves your health and reduces your risk of dying at a single point in time.
There were an extra 623,000 deaths in the UK in the year to mid-2018 – an increase of 3%.
On the whole, we're living longer and healthier lives, thanks to advances in medical care, as well as lifestyle changes. But there are major differences in the health experiences of different groups.
All around the world, women are living longer than men. While women are born with some early advantages, there are lifestyle factors that men can modify to improve their lot.
Life expectancy has more than doubled in the last two centuries. How much more can it increase?
Rates of elective surgery are rising most among those aged over 85, due to advances in anaesthesia and techniques such as keyhole surgery. But it's also much riskier.
The link between empire, inequality – and Brexit.
People who are 65 and up can expect to live longer than ever before. Does it make sense to keep classifying everyone in this group as old? A pair of demographers argue for 'age inflation.'
The Mexican slow-down in life expectancy improvements coincides with an unprecedented rise in violence.
A look at key data shows that the world is much better off today than ever before in history.
Data suggest that people are living many years in poor health in Africa.
The leading causes of death in sub-Saharan Africa for adults 15 to 49 years were AIDS, tuberculosis, malaria, maternal disorders, and road injuries.
Most researchers use the UN's Human Development Index to measure each country's progress, but that system has flaws. A new, simplified index aims to do it better.
Modern healthcare may be helping us live longer, but hunter-gatherers point to a less expensive option.
A person in the US can expect to live an average of 78.8 years. But that number can change by decades depending on the community they come from.
The age of the US is increasing, and with it, new expectations of health and happiness. Is the US prepared for the wave of baby boomers who will live long and want to be as healthy as they do?
An international comparison of life expectancy rates has raised alarm bells for the UK.
Based on his age in 'dog years,' could your animal pal legally buy alcohol? Or would he be cashing in on his senior discount? Veterinarians are more interested in life stage than a particular number.