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

2) The shortest scheduled commercial flight lasts just 1.7 miles and connects two Scottish islands, Westray and Papa Westray.

3) The eye of a cyclone is a region of calm, relatively clear skies and light winds at the center of the storm.

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