Imagine a fire flickering and sparking as the logs burn and settle down. Would you enjoy watching it? Many people find fires calming and fascinating to watch, at least ones […]
The helicopter was invented by the Chinese in the 4th century, more than a 1,000 years before Leonardo da Vinci. It was called the Bamboo Dragonfly and could fly 25 feet (7.6 m) up and down. The first modern helicopter was invented by the French.