And so, if a human head caught your attention first it indicates that you are stressed in life, and need to learnt o let go of things and relax a bit. 2. If you saw a tree first ...

The distribution of human genetic diversity: A comparison of mitochondrial, autosomal, and Y-chromosome data. American Journal of Human Genetics 66, 979–988 (2000) doi:10.1086/302825. Lewontin ...