Key Takeaway: Blue eyes are relatively rare in the global population: while estimates vary, they are generally thought to occur in less than 10% of people worldwide. Eye color is determined by a variety of factors, including genetics, melanin production, and even changes in the environment such as lighting and clothing color. The prevalence of … Read more
Key Takeaway: Green eyes are the rarest eye color among all ethnicities, but more common in people of European descent. The prevalence of green eyes varies among different countries, with over 80% of the population having blue or green eyes in Iceland, while green eyes are rare in countries like Australia and Brazil. Green eyes … Read more
Key Takeaway: The vast majority of the world’s oceans remain unexplored: Only about 20% of the global ocean has been mapped using modern sonar technology, leaving much of this underwater world still a mystery. Exploring the ocean is challenging and costly: The ocean is a harsh and volatile environment, and exploration requires advanced technology, skilled … Read more
Key Takeaway: Freshwater makes up only 2.5% of the Earth’s water supply: Despite the vast amount of water on Earth, only a small percentage is freshwater. The majority of Earth’s water is saline, making freshwater a valuable and limited resource. The majority of freshwater is inaccessible for human use: While freshwater is a vital resource, … Read more
Key Takeaway: The proportion of oxygen in Earth’s atmosphere is approximately 21%, making it the second most abundant gas after nitrogen. Oxygen is important for respiration, the process by which living organisms take in oxygen and give off carbon dioxide, and for photosynthesis, the process by which plants use carbon dioxide to make food … Read more
The Baltimore Sun reports that 13% of the US population was foreign-born during the Civil War. One in every four Union Army members was an immigrant. Thus, the northern forces could not have won the Civil War without the help of immigrant soldiers. What are the years describing those born before or during the Second … Read more
Volcanic eruptions are common in Japan. More than any other nation, it boasts over a hundred active volcanoes, making up around 10% of all active volcanoes worldwide. Why do earthquakes and volcanoes occur in Japan? Japan has a long history of volcanism. The Japanese archipelago is situated where various oceanic and continental plates collide, resulting … Read more
The United States of America’s flag is 17.6% blue, 40.9% white, and 41.5% red. The U.S. State Department and the U.S. Embassy in the U.K. stated that the official colors are Old Glory Blue, Old Glory Red, and Pantone White. Why is the American flag so important to the US? The American flag has served … Read more
According to the World Population Review, Utah is one of the states that have the highest Mormon population. There are 5,229 Mormon congregations in the state, making up about 68.55 percent of the overall population. When did Mormons move to Utah? Brigham Young, the successor of murdered sect founder Joseph Smith, led 148 congregates into … Read more
About 80% of the world’s population lives within 500 miles of an ocean. About 40% of the world’s population lives just 60 miles from the ocean. 10% of the world’s population lives by the coast in areas that are no more than 10 meters above sea level. What are the advantages and disadvantages of living … Read more