Mystery of Stonehenge Excavated for First Time in 40 Years in Britain

According to foreign media reports, the Stonehenge site is one of the most sacred places in Britain. On March 31, archaeologists finally broke the tranquility here and began excavation work, which was the first time in more than 40 years. They hope to uncover the long-standing mysteries surrounding Stonehenge - when was this prehistoric monument built and why was it built?