• If you could see enough of a rainbow it is actually circular. The reason for the curve is that when sunlight shines through a rainstorm the light is refracted and we can see the visible part of the spectrum at a particular set of angles in relation to us. The refraction, btw, is why you would never actually see the complete circly, but only the arc.
  • Haha, one could say it's to represent the "Ark" surviving after the flood. But if you wanted a scientific answer, just go by what the other guy said.
  • It's shaped that way so you can't find the pot o' gold at the end.
  • cause god made it that way

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