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

2) The construction of the Great Wall of China began in the 7th century BC and was completed over several centuries, spanning thousands of miles.

3) The oldest known musical instrument is a flute made from a bird bone, estimated to be around 43,000 years old.

4) Meryl Streep is an American actress widely regarded as one of the greatest performers in the history of cinema. She has received a record number of Academy Award nominations and has won several awards for her roles in films such as "The Devil Wears Prada" and "Sophie's Choice."