xkcd has an informative reference for what do in case of mountain lion encounter, lightning, fire alarm, and bleeding. Very informative.
xkcd: Pairwise matrix of what to do in an emergency
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After Marriage, How Long People Wait to Have Kids
First comes love, then comes marriage, then comes baby in the baby carriage. Sometimes.
Shifting Incomes for American Jobs
For various occupations, the difference between the person who makes the most and the one who makes the least can be significant.
Change in Common Household Types in the U.S.
In the 1970s, the most common household type in the U.S. was a married couple with kids. Things are different now.