Wimbledon tennis balls are kept at a temperature of 68 degrees Fahrenheit. The temperature of a tennis ball influences its bounce. The gas molecules inside the ball expand as the temperature rises, causing the ball to bounce higher. Lower temperatures shrink the molecules, causing the ball to bounce lower. Wimbledon goes through more than 50,000 tennis balls each year to ensure that only the best tennis balls are used.

We may think of processed cheese as a uniquely American invention (think Kraft and Cheez Whiz), but it turns out that the Swiss invented it first. According to the Michigan Dairy Review, processed cheese was invented in 1911 by Walter Gerber and Fritz Stettler in Switzerland to improve the shelf-life of cheese before it was shipped overseas.

The immensity of the Indian Ocean is the first piece of information that grabs anyone's attention. And it's not only big on the outside; it's also big on the inside. The Indian Ocean, which covers over 20% of the earth's total surface area, contributes significantly to the world's water burden.

In 1905, Frank Epperson, an 11-year-old boy, left soda powder and water outside overnight with the wooden stirrer still in the cup. The concoction had frozen due to the cold evening temperatures, and so the Popsicle was created. He marketed the dessert in his neighborhood and at a neighboring amusement park, and he even copyrighted the recipe. Years later, he changed the name to Popsicle since his children referred to their father's concoction. And if you like these strange facts, don't miss these 18 history courses your instructor lied to you about.

Libya's discovery of oil in the 1950s marked a significant improvement for the country, which had previously been one of the poorest in the world. The country's annual oil output peaked at 1.65 million barrels per day in 2010. Oil and petroleum products account for the majority of the country's exports and government revenue today. It is also one among Africa's 15 most prosperous economies, including South Africa, Nigeria, Algeria, Egypt, and Cameroon, among others. Nonetheless, the country's unpredictable political situation has caused worldwide oil price changes in recent years.

Vyshyvanka is the name of Ukraine's national costume. This is distinguished from others by its needlework work, which includes Ukrainian embroidery. Vyshyvanka is a basic white linen shirt embellished with floral or ornate hand-sewn embroidery. The costume's unique feature is that it may be worn by both men and women.

In 1909, Robert Peary (1856-1920) claimed to be the first man to reach the geographic North Pole. Experts now feel that his helper, an African-American man named Matthew Henson (1866-1955), deserves the honor. By the time Peary and Henson arrived at their destination, Peary had had a severe case of frostbite, rendering him unable to walk. (Instead, he had to be dragged around on a sled.) As they came closer to the North Pole, Henson and two escorts moved ahead on foot, but they mistakenly overshot their target, thus Henson officially arrived 45 minutes before Peary.

The only river in the world that flows in the opposite direction. The Chicago River, which flows through downtown Chicago, has a fascinating history. This river not only runs through numerous systems and canals, but it is also the only river in the world that flows backward. To divert sewage away from Lake Michigan's water supply, a reversal technique was implemented for sanitation reasons. The river reversal was acknowledged as the largest public earth-moving project ever completed. It was also recognized as a significant engineering achievement.

Korean idols will not be paid until they have paid off all of their debts. For example, if the label spent one million dollars training the members prior to their debut, they will not be paid until they have paid off the entire one million dollars to the agency. Some companies, including SM and JYP Entertainment, do not require newly debuted groups to repay their trainee debt.

Pink has been shown to reduce anger and anxiety while also having a calming effect. It is frequently used to help create a sense of calm in mental health care institutions and even prisons.

Despite the fact that Stoker placed his novel in Transylvania, he never visited the region. Instead, he did as much study on the setting as he could and made up the rest. Most of his Victorian readers couldn't tell the difference, especially when he included information from trip books like railway schedules, hotel names, and a chicken meal called paprika hendl.

The number of thunderstorms you see depends on where you live on the planet. For example, the United States is estimated to have 100,000 thunderstorms per year. However, there are 16 million thunderstorms on Earth each year. According to the National Severe Storms Laboratory, this equates to approximately 2,000 thunderstorms at any given time.

Your lodging in Japan will most likely have Yukatas, so you may try one on and feel like a true blue Japanese. Stay in traditional Japanese-style rooms with Tatami mats as bedding in Japan's rural districts to round out your experience.

Most people are aware that chess is an ancient game, but many are unaware that it dates back at least 1500 years! The game is thought to have started around 600 AD, long before the Middle Ages. The game was called Chaturanga back then, and it was nothing like the game we play now. In fact, the game represented a synthesis of games and rules, and it evolved over time, as everything does. When the game of chess spread throughout Europe, it roughly evolved into what we know today as chess.

The tomato was dubbed "the poison apple" in 18th-century Europe because aristocrats would frequently become ill and die after eating them. They had no idea that the explanation had to do with their tableware, not the tomatoes. The high acidity of tomatoes, according to the historical cookbook "Heirloom Flavor: Yesterday's Best-Tasting Vegetables, Fruits, and Herbs for Today's Cook," would cause lead to leach from the pewter plates used by rich aristocrats and cause lead poisoning. The aristocrats mistook the tomato for the source of the problem.

Here's a fun (and potentially hazardous) science experiment: If you split a grape almost in half and microwave it, it will explode into a fireball of plasma and lighting. Microwaves generate heat by using microwave radiation, according to scientists. When you microwave "nothing" — in this case, a very small grape that doesn't absorb enough power — the electromagnetic waves have nothing to work on and become concentrated.

The eastern and northern sections of the Sahara Desert make up the Libyan Desert. In an ideal world, it would be a section of the Sahara Desert in Libya. The Libyan Desert is noted for being the Sahara's harshest, driest, and most isolated area. With daytime temperatures reaching 50 degrees Celsius, this area might spend decades without rain.

This unexpected paradox arose due to how scores are calculated: the number of civil infractions and criminal offenses committed in a year should be divided by the municipal population. The number is considerably fewer in Vatican City than in So Paulo, Lagos, or the Bronx. In 2006, for example, the population of Vatican City was 492 people, but the number of crimes reported on its territory was 827. As a result, the statistical crime rate in the country was found to be the highest in the world - 1.68 crimes per inhabitant.

Algeria's national animal is the large eared fennec fox, which is always lovely. These little foxes, native to the Sahara Desert and the Sinai Peninsula, only weigh 1.5-2 kilogrammes and are known for their enormous ears. They are every bit as adorable as they sound. These adorable critters are so popular in Algeria that they are not only the national animal, but also the nickname for the country's football team, Les Fennecs.

According to some experts, our planet has a second satellite. Another cosmic object, according to scientists, is circling around the Earth. However, it is not necessarily the same object but rather a fleet of transitory satellites. It is thought that the gravitational field of Earth occasionally attracts quite large asteroids, which continue to follow our planet for a short period (approximately three revolutions) before dispersing into the expanse of space.

In Chicago, spray paint was invented. What inspired the idea of putting paint in a spray can with a spray tip? Ed Seymour, a Chicago paint salesman, invented this artistic substance, which is now used to create colorful works in public spaces throughout the city.

Communication might be difficult in a nation with enormous distances, but it is critical to retain a sense of community. Visitors to Mongolia's rural will always find a bowl of warm, salty milk tea waiting for them.