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

2) The first successful human heart transplant was performed by Dr. Christiaan Barnard in 1967.

3) The comedy group Monty Python, known for their surreal and irreverent humor, has had a significant influence on comedy and entertainment.

4) The United States recently held its presidential election in 2020, resulting in Joe Biden being elected as the 46th President of the United States and Kamala Harris as the Vice President, making history as the first female Vice President.