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

2) The development of artificial intelligence (AI) has led to advancements in areas such as machine learning, natural language processing, and computer vision.

3) The strongest natural material known to man is spider silk. It is stronger than steel and more flexible than nylon.

4) The FIFA Women's World Cup has been held since 1991 and showcases the best women's national soccer teams from around the globe.