1) The Eiffel Tower can be 15 cm taller during the summer due to thermal expansion.

2) Serena Williams, an American tennis player, has won a total of 23 Grand Slam singles titles, making her one of the most successful players in the history of the sport.

3) Cyclones, also known as hurricanes or typhoons, are powerful tropical storms characterized by low-pressure centers and strong winds.

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