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

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

3) The world's oldest known recipe is for beer and is over 4,000 years old.

4) Brad Pitt is an American actor and film producer. He has starred in a wide range of films, including "Fight Club," "Inglourious Basterds," and "Once Upon a Time in Hollywood," and has received critical acclaim and numerous awards for his performances.