Evolution of the scrollbar

From the teenage years to college to adulthood through retirement, sleep is all over the place at first but then converges towards consistency.

I looked at the percentages of people with a given number of kids in the family and the order they were born.

How common are wide age gaps between spouses? These are the age differences through the lens of the 2022 five-year American Community Survey.

In the 1970s, the most common household type in the U.S. was a married couple with kids. Things are different now.