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A cultural history of the ponytail
- jelliclesfarm 8y agoThere is such a thing as PonyTail Equation. Even won an Ignoble Prize. [..]The Rapunzel number is a ratio used in this equation to calculate the effects of gravity on hair relative to its length. This number determines whether a ponytail looks like a fan or whether it arcs over and becomes nearly vertical at the bottom. A short ponytail of springy hair with a low Rapunzel number, fans outward. A long ponytail with a high Rapunzel number, hangs down, as the pull of gravity overwhelms the springiness.[..]