+A helix is a smooth, three-dimensional curve, like a winding stair or corkscrew. This fundamental form appears widely in nature, from the intricate structure of [DNA](/wiki/DNA) to the elegant twist of a [Snail Shell](/wiki/Snail_Shell).
+## See also
+- [Spiral](/wiki/Spiral)
+- [Screw](/wiki/Screw)
+- [Spring](/wiki/Spring)
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