1) The sitcom "Friends" is known for its iconic Central Perk coffee shop, where the main characters often gather.

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

3) The Mona Lisa, painted by Leonardo da Vinci, is one of the most famous and valuable artworks in the world.

4) Usain Bolt of Jamaica holds the world records for the 100 meters and 200 meters sprints, with times of 9.58 seconds and 19.19 seconds, respectively.