Why do men grow facial hair? | Greg Foot Answers | Head Squeeze скачать в хорошем качестве

Why do men grow facial hair? | Greg Foot Answers | Head Squeeze

We all agree that beards look a lot better on men than they do on women, but why? Discover the origins of human facial hair with Greg in this Head Squeeze video. Thanks to Benjamin Jones for this posting this great question in our YouTube comments. In the beginning all babies are hairy, covered in a soft light down called vellus hair. Once we hit puberty everything changes when the hormones arrive. The sex hormones, androgens are present in both sexes and cause hair in puberty to become darker and thicken in the pubic areas and under the armpits. Men have more androgens than women and additionally find hair sprouting on their chest, upper lip and face. The answer to why men grow beards and women don't, lies in human prehistory and the theories of Charles Darwin. According to Darwinism animals, including humans, evolve features to attract the opposite sex and intimidate rivals of the same sex. So like lions with large manes and male peacocks with splendid arrays of feathers, men with big beards must have looked sexy and dangerous to our neolithic ancestors. Meanwhile women lacking facial hair have been naturally selected for in the process of evolution. Apparently if a man never shaves his beard it can grow to 30 feet long during a lifetime! Who is your favourite bearded person? Let us know in the comments, rate us and don't forget to subscribe for more fact based video wisdom from Greg and the team at Head Squeeze.    / headsqueezetv   http://www.youtube.com/subscription_c...