1) The unicorn is the national animal of Scotland.

2) The fingerprints of koalas are so similar to humans that they have been mistaken at crime scenes.

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

4) The World Wide Web, developed by Tim Berners-Lee in 1989, revolutionized the way information is accessed and shared on the internet.