1) Mount Everest, located in the Himalayas, is the highest mountain on Earth, reaching a peak elevation of 29,032 feet (8,848 meters).

2) The fall of the Berlin Wall in 1989 symbolized the end of the Cold War and the reunification of East and West Germany.

3) The national animal of Australia is the kangaroo.

4) The word "telephone" contains five vowels: E, E, O, E, and E.