That xkcd is such a joker. Munroe should start a comic.
xkcd: Ensemble model
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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.
How Many Kids We Have and When We Have Them
Many parents stop at two kids. Most are done by three. Still, everyone has their own timelines. Here are 1,000 of them.
If We All Left to “Go Back Where We Came From”
Imagine that those with immigrants in their family tree left the country. Almost everyone, basically.