When a shaped shadow points to the center of interest in a photo, the shadow will direct the viewer’s attention to the center of interest. [http://www.picturecorrect.com/tips/tips-for-using-shadows-in-photography/ ]
Hanson Gregory claimed to have invented the ring-shaped doughnut in 1847 aboard a lime-trading ship when he was 16 years old. He claimed to have punched a hole in the center of dough with the ship's tin pepper box. [Wikipedia]
Dishwashing liquid has been used to treat birds affected by oil spills. After the Exxon Valdez oil spill in 1989, the International Bird Rescue Research Center received hundreds of cases of dishwashing liquid that were used to clean up birds. [https://en.
