1) Usain Bolt of Jamaica holds the world records for the 100 meters and 200 meters sprints, with times of 9.58 seconds and 19.19 seconds, respectively.

2) The national animal of Australia is the kangaroo.

3) The word "mountain" contains three vowels: O, U, and A.

4) The universe is estimated to be around 13.8 billion years old.