While the function of the human appendix is not entirely clear, researchers believe it may play a role in the immune system. It's a small, tube-shaped pouch attached to the large intestine. Some theories suggest it acts as a reservoir for beneficial gut bacteria.

HTTP, which stands for Hypertext Transfer Protocol, is the foundation of data communication for the World Wide Web. It defines how messages are formatted and transmitted, and what actions web servers and browsers should take in response to various commands.

Julius Caesar's crossing of the Rubicon in January 49 BCE is one of the most famous events in Roman history, signifying his defiance of the Roman Senate's order for him to disband his army and the irreversible step towards the subsequent civil war, which ultimately led to the end of the Roman Republic and the rise of the Roman Empire.

The Oxford shirt got its name from Oxford cloth, a type of durable fabric invented by the fabric mill in Scotland during the 19th century. This shirt has become a staple of casual, preppy, and smart-casual styles.

Homer's laziness and ineptitude at his job at the Springfield Nuclear Power Plant is a recurring joke on The Simpsons. Despite his lack of motivation, he has managed to keep his position for decades.

Brahmacharya represents the student stage of a Hindu's life, during which one acquires knowledge and develops character, typically lasting from childhood until early adulthood.

The Berlin Wall was constructed in 1961 and stood for approximately 28 years before it was torn down in 1989. It divided East and West Berlin and became a powerful symbol of the Cold War's division of East and West Germany, and by extension, the ideological divide between communism and capitalism.

Snow White, from the 1937 animated film Snow White and the Seven Dwarfs, was the first Disney Princess. This film was also the first full-length cel animated feature film in history and the first American animated feature film in movie history.

Roman numerals use a combination of letters from the Latin alphabet to represent numbers. A horizontal line above a numeral, such as M, indicates that it should be multiplied by 1,000. Therefore, M with a horizontal line above it represents one million.

Technetium was the first element to be artificially produced. It was created by Carlo Perrier and Emilio Segrè in 1937. Despite being the first element synthesized, technetium does not occur naturally in any significant quantity on Earth and is found naturally only in trace amounts as a product of certain nuclear reactions.