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Wave pattern of a little droplet dropped into mercury in the foci of the ellipse
Wave pattern of a little droplet dropped into mercury in the foci of the ellipse
Image: Tilted Ellipse 2
Image: Tilted Ellipse 2
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Circular cave paintings in Santa Barbara County, California
Circular cave paintings in Santa Barbara County, California
Circles in an old Arabic astronomical drawing.
Circles in an old Arabic astronomical drawing.
The compass in this 13th-century manuscript is a symbol of God's act of Creation. Notice also the circular shape of the halo.
The compass in this 13th-century manuscript is a symbol of God's act of Creation. Notice also the circular shape of the halo.