You know the feeling –it’s the early afternoon and you are feeling tired and sluggish. It’s easy to go to a convenience store and grab a Red Bull for a […]
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.