1) The world's first paper money was created in China over 1,000 years ago.

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

4) The Amazon rainforest produces more than 20% of the world's oxygen.