SortStack #411 — 2027-07-25

By population · Order from fewest to most people.

1. Sumo wrestlers in Japan's top makuuchi division 42

   Exactly forty-two slots exist; wrestlers are promoted or demoted after every single tournament.

2. San Francisco — the city proper 810K

   Smaller in population than Indianapolis, despite its outsized cultural footprint.

3. The population of Australia 26.6M

   Nine in ten Australians live within 50 km of the coast; the interior is nearly empty.

4. The population of Egypt 112M

   About 95 percent of Egyptians live on just 5 percent of the land, hugging the Nile.

5. Natural redheads worldwide 140M

   Just one to two percent of humanity; the gene is recessive, so it can skip generations.

6. Everyone living on the African continent 1.5B

   The youngest continent: the median African is around 19 years old.

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