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When the First Emperor of China died 2,000 years ago, he was buried in a giant tomb. In 1974, this tomb was discovered along with an army of over 6,000 terracotta warriors. …
When the volcano Vesuvius erupted 2,000 years ago, the city of Pompeii disappeared under the ash. Four hundred years ago, Pompeii was rediscovered. The ash had preserved Pompeii so …
Watch an abandoned building being demolished and a new one rise in its place. Observe concrete cutters, bulldozers, excavators, concrete mixers, cranes, tunnel borers and steam …