Once extremely abundant throughout all tributaries to Lake Ontario and the St. Lawrence River, the American eel has seen a dramatic population decline. In 2006, the presence of eels in […]
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.