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Three-Arc Illusion

 

The larger an arc is, the smaller its radius appears. For example, the three arcs illustrated above belong circles of the same radius.

This entry contributed by Margherita Barile

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Why Do We Believe That Catastrophes Come in Threes?

COMMENTARY
By JOHN ALLEN PAULOS

July 5, 2009

Michael Jackson's untimely death coupled with the deaths of Ed McMahon and Farrah Fawcett in the same week revived the belief of many that celebrity deaths, plane crashes and all manner of catastrophes come in threes. The persistence of this belief is difficult to explain since the case for it is so easily demolished.

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Three-Tailed Giant Turtle

Three-Tailed Giant Turtle

Three-Tailed Giant Turtle

The Three-Tailed Giant Turtle (三尾の巨大亀, Sanbi no Kyodaigame) is a large, turtle-like tailed beast. It was formerly sealed in Yagura. The Three-Tails receives much more attention in the anime than the manga.

Background

At some point in the past, the Three-Tails was sealed within Yagura from Kirigakure. It was later extracted from its host for some reason and escaped into the wild. Because it did not have a host it was not smart enough to effectively utilize its great strength, instead being reduced to animal instincts.

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