Knowth is the site of a Neolithic passage grave in the valley of Ireland’s River Boyne. Built approximately 5,000 years ago, the site consists of a large mound containing two passages leading to burial chambers. This is surrounded by 17 smaller satellite tombs. Knowth contains more than a third of all the megalithic art in Western Europe, including hundreds of stones decorated with spirals, crescents, and other shapes. Why do some believe that Knowth exhibits evidence of astronomical alignment? Discuss
Source: The Free Dictionary