Knowing whether or not you have social anxiety can be difficult. There are varying degrees of anxiety and if you don’t talk about it then it’s hard to pinpoint which […]
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.