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Life of 2π

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By Pine, Hahc21, and The ed17
A radian is a unit of angular measure. A turn in a full circle has an angle of 2π radians. This animation is a new featured picture.
This Signpost "Featured content" report covers material promoted from May 19, 2013 through May 25, 2013.
An ad for Gagak Item, a 1939 film made in the Dutch East Indies, from the new featured article.
A Norman Cob horse, from the new featured article.
A replica of a helmet found at Sutton Hoo; the original, which was buried with an Anglo-Saxon leader, dated from c. 620. From the new featured article.

Twelve featured articles were promoted this week.

Four featured lists were promoted this week.

A male Mandarin Duck
American actress Jaimie Alexander
Grose Valley, Australia

Twelve featured pictures were promoted this week.

The Cantino planisphere
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