1) The world's first credit card was introduced in 1950 by Diners Club.

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

3) Mountains are formed through various geological processes, including tectonic plate movements, volcanic activity, and erosion.

4) The human brain has a storage capacity equivalent to around 2.5 petabytes, which is roughly equivalent to three million hours of TV shows.