> It’s slightly paradoxical — in the past, I’ve thought about how since life expectancy is increasing, there probably will be more great-grandmothers. But on th

> It’s slightly paradoxical — in the past, I’ve thought about how since life expectancy is increasing, there probably will be more great-grandmothers. But on the other hand, people are having children much later too. Apparently two or more independent variables create a paradox.