1) The speed of light is approximately 299,792,458 meters per second.

2) The first commercial GPS (Global Positioning System) was launched in 1989 and provided accurate positioning and navigation capabilities to users worldwide.

3) The world's tallest waterfall is Angel Falls in Venezuela, with a height of about 3,212 feet (979 meters).

4) The highest-grossing film of all time is "Avengers: Endgame," which has earned over $2.79 billion at the global box office.