A helix is a three-dimensional spiral shape that can be found in various natural and man-made structures. It resembles a coiled spring or a twisted ladder, where each turn of the spiral is evenly spaced. Helices are commonly observed in biological molecules, such as DNA, which features a double helix structure, and in proteins, where alpha helices are a common structural motif. In addition to biology, helices are also used in engineering and architecture. For example, helical gears are designed to transmit power efficiently, while staircases can be built in a helical form to save space. The helix shape is not only aesthetically pleasing but also functional in many applications.