Trivia

Dolphins confer just beneath the surface before taking group action. Underwater researchers say each pod member chirps some input.

An infant tends to resemble the father more than the mother. Or so says a University of California social psychologist. As the child grows, though, the resemblance to either parent lessens, this scholar says.

Joseph C. Gayetty of New York City invented toilet paper in 1857. I don’t know the details.

Those who gladly call themselves bean counters break down average airline travel costs this way: Of every dollar, 44 cents goes for the plane ticket, 25 cents for hotels, 14 cents for restaurants, 10 cents for car rentals and 7 cents for miscellaneous. It’s easy to run a little short of miscellaneous, might mention.

The Rule of 80-20 also holds in bookstores, evidently. Some owners say 80 percent of the books sold go to 20 percent of the customers. Or thereabouts.