Happy St David's Day!

Wales' national holiday - celebrated here with the obvious question:

Why do Welshmen sing in large groups? The website of Treorchy Male Choir, one of the oldest and most celebrated, traces it to two late 19th century events: the fervor of religious nonconformity and the acceleration of the coal mining industry. It is testament to the human spirit that the men of the mines tried to improve the dreadful condition of their work by the beauty of their own voices singing. And so a national identity was born, still widely seen at rugby matches.