A population pyramid shows the overall demographic structure of a country's population.

The US population is expected to keep growing through at least 2060, the last year of the projections. By that time, the Census Bureau predicts that the US will have around 417 million people, up ...

So, by 2060, the dome will have come and gone and the shape of the population will look more like a column (or perhaps an old-fashioned beehive). Read the full article from The World In 2015.

Millennials. Alphas. Boomers. We throw out these terms as shortcuts for psychological and cultural experiences. Population pyramids can help us see how cohort shapes us.