1) The speed of a sneeze can reach up to 100 miles per hour (160 kilometers per hour).

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

3) Elvis Presley, often referred to as the "King of Rock and Roll," has sold over one billion records worldwide.

4) The largest living structure on Earth is the Great Barrier Reef, spanning over 2,300 kilometers (1,400 miles) along the coast of Australia.