1) The most-watched TV series finale in the United States was "MAS*H," with an estimated 105 million viewers.

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

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

4) The concept of separation of powers, as articulated by French philosopher Montesquieu, refers to the division of government responsibilities into distinct branches, such as the executive, legislative, and judicial, to prevent concentration of power.