1) The first computer mouse was invented by Douglas Engelbart in 1964 and consisted of a wooden shell and two metal wheels.

2) 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.

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

4) The New York Stock Exchange (NYSE) is the largest stock exchange in the world.