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.

Mount Everest, at 29,028 feet (or 8,848 meters), is the world's tallest mountain above sea level. The tallest peak in the world, however, is in the United States. When measured from the bottom, Hawaii's Mauna Kea towers over 32,000 feet (10,000 meters). Because it barely rises 13,796 feet (4,205 meters) above sea level—and more than half of its base is below sea level—it doesn't get nearly as much attention as the Himalayas.

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.

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.

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.

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.

The Indian Ocean has one of the lowest oxygen concentration of any ocean on the planet, owing to a higher evaporation rate than runoff or precipitation intake. This distinguishes life development in the Indian Ocean.

If you exclude Russia, which is located in both Asia and Europe, Ukraine is the largest country in Europe in terms of land area. Ukraine has a total land area of 603.55 square kilometers. While Ukraine is Europe's largest country in terms of land area, it is not the most populous. With a population of roughly 46 million people, it is smaller than Germany and France.

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.

The Dead Sea is the world's lowest point. The Dead Sea has ten times the salt content of any other sea. It is located 420 meters below sea level and offers a one-of-a-kind floating experience. Also, don't miss out on the Dead Sea mud's magical healing powers.

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.

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.

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.

Aston Martins and James Bond go together like peanut butter and jelly. Since Sean Connery drove the classic DB5 in 1964's Goldfinger, the automaker has been associated with the famed British secret spy. As a result, Aston Martins have appeared in 12 of the 24 Bond films. It will soon be 13 with the publication of No Time To Die, which will include four Astons: the DB5, V8 Vantage, DBS Superleggera, and Valhalla.

Steve Rogers was physically born on July 4th. There wasn't always a lot of complexity in the early days of comics. Steve was primarily designed to be patriotic and punch Hitler, so it's not surprising that they took his birthday so seriously. However, the choice is appropriate, as Cap has grown to embody the noblest principles of America throughout the years. (A role that Chris Evans appears to be taking on in real life as well.) In addition, if you follow astrology, you now know that he is a Cancer.

Friends was one of the most famous TV series of the 1990s and early 2000s, whether you liked it or despised it. One of the most startling facts about Friends is that it was shot at the Warner Brothers Ranch just outside of Los Angeles rather than in Manhattan, where it is set. Having saying that, there are a few locales outside of Los Angeles where filming took place. One of these is, of course, Monica and Rachel's New York apartment complex at 90 Bedford St.

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.

Brazil's gigantic floating metal Christmas tree achieved a world record in December 2007 at 278 feet and 10 inches tall and blazing with over three million lights. Every year, the tree is brought out as part of Rio de Janeiro's Rodrigo de Freitas Lagoon.

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.

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.