German postcard by Kunst und Bild, Berlin, no. A 190. Photo: Keystone.

‘Hollywood’s Mermaid’, Esther Williams (1921-2013), swam her way through more than a dozen splashy MGM musicals in the 1940s and early 1950s. While smiling at the camera, she was able to do a combination of crawl, breast and backstroke, and was forever blowing bubbles under water, seemingly having an inexhaustible supply of air.

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