Rising life expectancies and improved health means the population is ageing much more slowly than at the end of last century.
The US and Austrian study in the well respected Science magazine makes a number of amazing discoveries.
The study also reports that, due to technological advances, fast cars are faster than even 10 years ago. Similarly, slow drivers drive more quickly than their counterparts in the Nineties.
On the meteorological front, bad weather is worse than it used to be while the expression "nice and warm" is used much more than it used to be.
More revelations are expected.