April 12 in history: American Civil War begins, Yuri Gagarin becomes first human in outer space and more

From the beginning of the American Civil War begins to the first human in outer space, we've got it all covered!

Let's dive into today's history.

1861

The American Civil War begins.

(Photograph:WION)

1955

Salk vaccine against polio is declared safe and effective.

(Photograph:WION)

1961

Russian cosmonaut Yuri Gagarin becomes first human in outer space.

(Photograph:WION)

1981

NASA launches first space shuttle, Columbia.

(Photograph:WION)

2009

Zimbabwe officially abandons Zimbabwean dollar as its currency.

(Photograph:WION)

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