If you follow the steps below you will laugh more frequently. Laughter is an excellent form of aerobic exercise: a hearty, belly laugh produces the same physical response as thirty […]
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.