1) The most-watched television event in the United States is the Super Bowl, with millions of viewers tuning in each year.

2) The concept of 3D printing, also known as additive manufacturing, was first introduced in the 1980s and has since revolutionized prototyping and small-scale production.

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

4) The sport of golf originated in Scotland and is played on courses with 18 holes, each with a designated par score.