The compass Ancient mariners navigated by the stars, but that method didn’t work during the day or on cloudy nights, and so it was unsafe to voyage far from land. The Chinese invented the first compass sometime between the 9th and 11th century; it was made of lodestone, a naturally-magnetized iron ore, the attractive properties […]
3. The Great Wall Of China, China – Heritage site since 1987. Built in the 14th century, the Great Wall Of China stretches for 8,850 kilometers! This amazing wall was built to protect the northern borders of the Chinese Empire from the attacks of nomadic tribes. The Great Wall is often claimed to […]
