The latest social media craze involves an ancient song tradition. TikTokers have discovered the sea shanty. Eli Glasner looks at why it's captivated an enormous global audience.

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The National is CBC's flagship nightly news program, featuring the day's top stories with in-depth and original journalism, with hosts Adrienne Arsenault and Andrew Chang in Toronto, Ian Hanomansing in Vancouver and the CBC's chief political correspondent, Rosemary Barton in Ottawa.