1.Earth is the only known planet with liquid water.
2.The Great Barrier Reef, the world's largest coral reef system, is visible from space.
3.The largest living organism on Earth is a fungus called Armillaria ostoyae.
4.The world's tallest mountain, Mount Everest, is located in the Himalayas.
5.The longest river in the world is the Nile, stretching over 4,000 miles.
6.The world's deepest ocean trench is the Mariana Trench, located in the western Pacific Ocean.
7.The total land area of the world is approximately 57.5 million square miles.
8.The largest desert in the world is the Antarctic Desert.
9.The world's population is estimated to be over 7.9 billion people.
10.There are over 7,000 languages spoken around the world.