The Reality Reports

A resting duck may look awake because one eye remains open. However, the bird may actually be sleeping with half of its brain. This ability is called unihemispheric slow-wave sleep. It allows one side of the brain to rest while the other side stays more alert. This unusual form of sleep has been observed in several bird species. It helps explain how some birds balance their need for rest with the need to watch for danger.

A QR code looks like a random patch of black and white squares, yet every part has a job. It can store a website address, ticket number, contact details, product record, or other information. A phone camera reads the pattern and changes it back into usable data within seconds. QR stands for “quick response.” The name reflects the code’s original purpose: being read rapidly in busy workplaces.

The Original Colors: White And Black When you watch a tennis match today, you probably notice the bright yellow-green balls bouncing across the court.  But did you know that tennis balls were not always this color? Before 1972, tennis balls were usually white.  Sometimes, black tennis balls were used, especially on grass or clay courts where white balls could blend into the background.  These early color choices were practical for players and spectators who watched matches in person, but things changed as technology advanced.