Newgrange is a prehistoric passage tomb in County Meath, Ireland. built during the Neolithic period around 3200 BC and predates monuments such as Stonehenge and the Egyptian pyramids. The site consists of a circular mount with retaining walls and contains stone passages and chambers where human remains have been discovered on previous archaeology excavations by antiquarians from the 18th century. Normally we inherit two copies of the genome, one from each parent, but the individual buried in the chamber had genomes that were remarkably similar, suggesting that his parents were first-degree relatives and are a key indicator of inbreeding... Dan...