Bid to solve mystery of swan glyph found on kerbstone at 5,500-year-old Irish passage mound

Discovery at Knowth links the Boyne Valley to ‘swan and sunrise’ winter solstice motifs found in ancient cultures worldwide

The Knowth passage mound and outlying mounds in the Boyne Valley, Co Meath, Ireland.

Irish-American writer and journalist Ben Gagnon made an extraordinary discovery about Ireland’s distant…