1) Mountains are formed through various geological processes, including tectonic plate movements, volcanic activity, and erosion.

2) Elvis Presley, often referred to as the "King of Rock and Roll," has sold over one billion records worldwide.

3) Ramen is a popular Japanese dish consisting of wheat noodles served in a flavorful broth, often topped with ingredients such as sliced pork, green onions, and soft-boiled eggs. It originated in China and was introduced to Japan in the late 19th century. Ramen has evolved into a culinary art form, with various regional styles and broth bases, ranging from soy sauce to miso and tonkotsu (pork bone). It is a beloved comfort food and has gained international recognition.

4) The smallest unit of time is known as a zeptosecond, which is equal to one trillionth of one billionth of a second.