1) The Appalachian Mountains, running along the eastern coast of the United States, are one of the oldest mountain ranges in the world.

2) The world's tallest waterfall is Angel Falls in Venezuela, with a height of about 3,212 feet (979 meters).

3) The Cricket World Cup is held every four years and features teams from around the world competing for the prestigious title.

4) The smallest unit of time is known as a zeptosecond, which is equal to one trillionth of one billionth of a second.