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

2) Lightning strikes the Earth about 8 million times a day.

3) The musical "Les Misérables" is one of the longest-running shows in the West End and Broadway, with over 13,000 performances.

4) The lotus flower is considered a sacred symbol in many cultures and is associated with purity, enlightenment, and rebirth.