1) The Great Wall of China is not visible from space without aid, contrary to popular belief.

2) Political ideologies such as liberalism, conservatism, socialism, and communism shape and influence policies, governance, and societal values in different countries and contexts.

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

4) The tongue of a blue whale is so big that about 50 people could stand on it.