Typically, muscular "strength" refers to the ability to exert a force on an external object. By this definition, the jaw muscle is the strongest. The 1992 Guinness Book of Records records the highest bite strength of 4337 N (975 lbf) for 2 seconds. What distinguishes the jaw muscle is not anything special about the muscle itself, but its advantage in working against a much shorter lever arm than other muscles. If "strength" refers to the force exerted by the muscle itself, the strongest muscle of the body is usually said to be the quadriceps femoris or the gluteus maximus. The unexplained statement that "the tongue is the strongest muscle in the body" appears frequently in lists of surprising facts, but it is difficult to find any definition of "strength" that would make this statement true. Note that the tongue consists of sixteen muscles, not one.

There is a common rumor about the US military dog tags issued between 1941 and the early 70s. The rumor states that the notch on the dogtag is meant to be placed between the front teeth of a deceased soldier, and forcefully jammed between the teeth, for later identification of the body. The real, and only, purpose of this notch was to hold the blank tag in the machine that punched the letters onto the tag. Current machines do not need the notch to hold blank tags, therefor current tags do not have the notch.

Contrary to popular belief, the Great Wall of China is not the only man made object on earth that is visible from space; in fact, the Great Wall is barely discernable, and only under perfect conditions. Low earth orbit(160-350 miles up) is the altitude that the space shuttle orbits at. At this "low" level of orbit, many man made objects are viewable to the naked eye, including airports, bridges, dams, and highways. The Wall is only 30 feet wide, and is of a similar color to its surroundings. The myth that "the Great Wall is the only man-made object visible from the moon" started in 1938 when the book "Second Book of Marvels, the Orient" was published, stating that "Astronomers say that the Great Wall is the only man-made thing on our planet visible to the human eye from the moon." Something that is almost invisible at 180 miles certainly isn't visible at 237,000 miles.