Cowlick
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A cowlick is a section of human hair that stands straight up or lies at an angle at odds with the style in which the rest of an individual's hair is worn.
A child with a double crown
Hairy ball theorem
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The hairy ball theorem of algebraic topology states that there is no non-vanishing continuous tangent vector field on even-dimensional n-spheres. For the ordinary sphere, or 2‑sphere, if f is a contin
Cowlick
…Hair whorl Hairy ball theorem Media related to Cowlicks at Wikimedia Commons…
A continuous tangent vector field on a 2-sphere with only one pole, in this case a dipole field with index 2. See also an animated version of this graphic.
A hair whorl