A crewneck refers to a round, collarless neckline, often featured on t-shirts, sweatshirts and other casual tops. The name comes from the shirts worn by rowers and other boat crew members in the early 20th century.

Perennials are plants that live for more than two years, as opposed to annuals which complete their life cycle in one year, and biennials which take two years. Many perennials die back to the ground each winter and regrow in the spring from the same root system.

The first feature-length movie with synchronized dialogue was "The Jazz Singer," released in 1927. It was a major hit and launched the era of sound films, which quickly replaced silent movies. Sound films were colloquially referred to as "talkies."

The Ford Model T, introduced in 1908, was the first automobile that was affordable for the masses due to Henry Ford's innovative assembly line production methods. By 1927, over 15 million Model Ts had been produced.

The Simpsons is the longest-running American sitcom and animated program. It began as a series of animated shorts on The Tracey Ullman Show in 1987 before debuting as its own half-hour prime time show in 1989.

Jane Austen completed the first draft of "Pride and Prejudice" in 1797, initially titled "First Impressions". However, the novel was not published until 1813, after extensive revisions. It has since become one of the most beloved works in English literature.

The Dow Jones Industrial Average is a stock market index that tracks 30 large, publicly-owned companies trading on the New York Stock Exchange (NYSE) and the Nasdaq. The DJIA is one of the oldest and most widely followed stock market indices.

While Tolkien spent most of his life in England and is closely associated with Oxford University, he was actually born in Bloemfontein, South Africa in 1892. His family moved back to England when he was 3 years old.

Star Wars (later retitled Star Wars: Episode IV – A New Hope) was released on May 25, 1977. It was a groundbreaking film in terms of special effects and became a massive cultural phenomenon, spawning a franchise that now includes numerous sequels, prequels, TV series, books, comics, and video games.

Carbon dioxide is the primary greenhouse gas emitted through human activities. It is released through burning fossil fuels (coal, natural gas, and oil), solid waste, trees and other biological materials, and also as a result of certain chemical reactions (e.g., manufacture of cement).