Some dolphin species face the threat of extinction, often directly as a result of human behavior. The Yangtze River Dolphin is an example of a dolphin species which may have recently become extinct.

Initially golf balls were made out of wood. After that they were made out of leather which was stuffed with feathers.

5% of the world population lives in the US but 22% of the world's prisons population are held in the US.

AMAZING FACTS