What Makes Hair Curly?
I spent an hour curling one daughter's hair for an occasion this past weekend, while the othe... ...? On one level, the texture of a person’s hair derives from his or her genes. A 2009 study looke... ...(That means about nine tenths of the variation in hair texture wit...
https://www.neatorama.com/2013/02/18/What-Makes-Hair-Curly/
