1) 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.

2) A group of flamingos is called a "flamboyance."

3) The word "oxygen" contains two vowels: O and E.

4) The longest-running TV show in history is "The Simpsons," which has been on the air since 1989 and has over 700 episodes.