Family size around the world is dropping. That choice by couples is triggering a population shift that's sending shock waves ...

We seem fascinated by generations, using them to evoke shared experiences and to push us apart. Demography, the science of population change, defines a cohort as a group of people born at roughly the ...

At the time of writing, there were an estimated 8,123,518,311 living humans on Earth – roughly the most there has ever been. But as fertility and birth rates continue to freefall, the numerical peak ...