Why?

WHY do babies have 70 more bones than adults? Newborns tend to have about 270 bones, most of which are tiny. This makes the skeleton more flexible and helps the baby get through the birth canal and grow quickly. As they get older, many of these bones fuse together. 📌The adult skeleton consists of an average of 200-213 bones.

WHY are the ribs of coins notched? Coins used to be valued according to the amount of metal they contained. Fraudsters used to cut the metal off the edges, pocketing the gold and silver. It was incredibly difficult to catch them. A solution to this problem was suggested by Isaac Newton, who was an employee of the British Royal Mint. He suggested making fine notches on the edges of the coin, which made the worn edges immediately visible.

WHY is everything colored green in night vision devices? In traditional night vision devices (not thermal imagers), light entering the lens is converted into shades of black and white, and only when it hits the phosphor screen does it take on a greenish hue. The green gamut is chosen for two reasons: ✔ the human eye is most susceptible to waves of this length. ✔ it is the least tiring to the eye for prolonged exposure.

WHY are extroverts and introverts ideal life partners? ➡️ Extroverts tend to be active, sociable people. They easily establish contact with others. They can also be inspiring and encouraging. ➡️ Introverts are quiet ones. Take a long time to think through decisions, analyze all options. Able to avoid problems. Therefore, calm introvert keeps from making rash decisions, and temperament extrovert rouse the other half.

WHY are sweet foods sticky? It's due to the chemical bonding that occurs between sugar and water molecules. The water molecules envelop the sucrose and create a shell. Thus, at high concentrations (like honey, jam, syrup) they form hydrogen bonds with each other. 📌This bonding is what gives the sticky feeling.

WHY do calculators start at the bottom and the phone starts at the top? The calculator is the successor of cash registers and mechanical counting machines. That's why the numbers on the calculator from zero to nine are from the bottom to the top. Until the 1960s, dialing on the telephone was done with a dial. Then tone dialing became possible, and the familiar dial was replaced by buttons. There were many different attempts: they were arranged in a circle, or in two rows... But as a result, the familiar option was chosen, where the numbers are arranged in three rows in ascending order (from top to bottom).

WHY are Japanese suicide bombers called kamikazes? The Mongol khan Kublai twice planned an invasion of Japan, and both times he was prevented by violent typhoons. The Japanese saw this as a help from above and called them "kamikaze," which means "divine wind." And in World War II they used the term to describe suicide pilots.

WHY are the veins blue if the blood is red? The bluish or greenish tint of veins is due to the way light passes through layers of skin and subcutaneous fat. When looking at our arm or leg, we see the picture of light reflected from the tissues. Skin is weak in transmitting light, unlike blood. Yet red waves of light penetrate the tissues better than blue. Blood, on the other hand, more readily absorbs blue and purple light, which explains why we see it as red. When a blood vessel runs close to the surface of the skin, almost all of the blue light is absorbed by the blood and some of the red light is reflected.

WHY does the British Queen lack of a passport? Even though the Queen does not have a passport, she is free to travel around the world. Since UK passports are issued in Her Majesty's name, the Queen does not need one. All other members of the royal family have passports. Also, the Queen is the only person in Great Britain who is allowed to drive a car without a license.

WHY does a dolphin sleep with one eye open? Dolphins are able to sleep by alternately turning off one of their hemispheres. The other hemisphere is awake at that moment. Accordingly, one eye is open in order to monitor changes in the environment. If the right hemisphere sleeps and the left one is awake, the right eye is open. And vice versa.