I was watching Think TV's "What makes us human?" and they were talking about Netanderthaws, the now extinct species in the genus homo. At one point they existed along with our predecessor and somewhere down the line mated, passing along a very small trace of DNA that can now still be found in most humans. Within that is chromosomes of immunity. I can't help but wonder if there is a relationship with this to alopecia, or if it has been researched by the scientific community. They did say the neanderthaws were fair skinned with a far swept back hair line believed to help the conversion of weak sun to vitamin D in there homeland. Your thoughts, or input?