Science
Tusi couple
Nasir al-Din al-Tusi
Mathematical device in which a small circle rotates inside a larger circle twice the diameter of the smaller circle
ByNasir al-Din al-Tusi

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LimaรงonText
Penrose triangleText
MonodromyTextArchimedean spiralTextOloidText
TourbillonText
Pentagonal orthocupolarotundaText
Elongated pentagonal gyrobirotundaText
Gyroelongated triangular bicupolaText
2x2 Rubik's CubeTextUlam spiralText
ThaumatropeText
Pentagonal rotundaTextAround this
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