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Kidney stone paradox

Simpson's paradox

Statistics are tricky. Consider this: of two treatments for kidney stones, Treatment A is better on average for large stones and small stones. But consider all stones together and Treatment B is better. This is Simpson’s paradox.

Bishop of the moon

Moon craters

According to 1917 Roman Catholic canon law, any newly discovered territory fell under the jurisdiction of the bishop of the “port of departure.” So, after the 1969 moon landing, was the Bishop of Orlando also the Bishop of the Moon?

Food for a day

Ration

The humanitarian daily ration (HDR) is a small non-perishable package designed to provide one day’s food supply to anyone, regardless of religious dietary restrictions. Just don’t make it the same colour as a bomb when you airdrop it.

Elf ring

Fairy Ring

Ever see a set of mushrooms growing in a near-perfect circle? Or an arc of dead or dark grass on a green field? Folklore calls it the elf ring or fairy ring, but it actually has a very reasonable biological explanation.