1) The universe is estimated to be around 13.8 billion years old.

2) The Super Bowl is the championship game of the National Football League (NFL) in the United States and is one of the most-watched television events each year.

3) The Treaty of Versailles, signed in 1919, officially ended World War I and imposed heavy penalties and reparations on Germany.

4) Mountains are formed through various geological processes, including tectonic plate movements, volcanic activity, and erosion.