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... I find square is difficult

QuoteSaturn, the sixth planet in our solar system, has caused quite a stir ... when the NASA Cassini Orbiter photographed a six sided geometric shape on the surface of the planet....sorry, you cannot view external links. To see them, please REGISTER or LOGIN

Saturn, the sixth planet in our solar system, has caused quite a stir ... when the NASA Cassini Orbiter photographed a six sided geometric shape on the surface of the planet.

Quote from: latebind on 06/12/2009 22:13:28... I find square is difficultTable salt is close* to square ......sorry, you cannot view external links. To see them, please REGISTER or LOGIN* Perfect geometric shapes are idealized mathematical concepts and don't occur in nature.

I however have to disagree with your statement ..."* Perfect geometric shapes are idealized mathematical concepts and don't occur in nature."I believe that they can and do exist, take for example a simple soap bubble, which can easily be a perfect sphere.

Also a rainbow is a perfect circle.

Light travels in a straight line.

Waves of all sorts are mathematically definable shapes.

Behold the carbon nanotubeEDIT: oops, I forgot that these tubes don't occur naturally []