I think it is natural selection. genetic variation also could be a factor for physical variation over the years.
The matrix nourishes the nail and attached the nail body to the surface of the tissues below
C. hpv can be cured antibiotics? It can not entirely be cured, antibiotics can only keep it under control
What makes people healthy can be the type of food they eat such as salad, vegetables and other foods. What makes people unhealthy is when they eat junk food or they eat fast food everyday. I am not saying that to offend anyone. It is just how their parents feed their children to eat the right food to live a healthy lifestyle. It is not only that people are healthy physically. It is also by trusting God with all of your heart. If you don't believe in God, that's okay. Other people exercise so they can lose weight. That is how people can people can be healthy and how people are unhealthy. I am not too sure how to explain the second question but I hope this answer helps you :)
