◆ On this day

September 20

2 sourced moments from September 20 in history: Magellan sailed off to circle the Earth (1519); and Billie Jean King won the 'Battle of the Sexes' (1973).

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2 things happened on September 20

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1973 Sports · Tennis

Billie Jean King won the 'Battle of the Sexes'

In a circus-spectacle showdown watched by tens of millions, the 29-year-old champion dismantled a 55-year-old hustler in straight sets.

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1519 Geography · Borders & Maps

Magellan sailed off to circle the Earth

On September 20, 1519, five ships left Spain on a voyage that would become the first to circumnavigate the globe.

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