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

2) The concept of quantum computing explores the use of quantum mechanics principles to perform complex computations, potentially revolutionizing fields such as cryptography and optimization.

3) The Beatles hold the record for the most number-one hits on the Billboard Hot 100 chart, with 20 songs reaching the top spot.

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