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

2) The national flower of Japan is the cherry blossom, which holds great cultural significance and is celebrated during the annual cherry blossom festivals.

3) The world's first stock exchange was established in Amsterdam in 1602.

4) The world's oldest living plant is believed to be a clonal shrub called "Old Tjikko" in Sweden, estimated to be over 9,500 years old.