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

2) Male seahorses are the ones who give birth to their offspring.

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

4) The concept of insurance dates back to ancient times when merchants would distribute their goods across different ships to reduce the risk of losing everything in a single event.