A crescent Venus as seen in ultraviolet light by the Hubble Space Telescope. JPL. Back when Earth was very young, our home world was steadily pummeled by large solar system debris. While Earth withstood the barrage of hits like a prizefighter that wouldn't fall down, one blow nearly destroyed the world.
10 Legends and Stories of the Great Wall of China (1). The majestic Great Wall was built with wisdom, dedication, blood, sweat and tears. As one of the Eight Wonders in the world, the Great Wall of China has become the symbol of the Chinese nation and its culture.
The Great Wall was built by three warring kingdoms, then extended and rebuilt by at least six dynasties, and finally restored and rebuilt as a tourist attraction by the Communist Chinese government. The Great Wall's history stretches 2,300 years, from around 300 BC to the present day.