Resumen de Written in your blood
Pilcher talks about blood. It is already possible to learn a fair amount about a person from a drop of their blood, by looking at the sequence of their DNA. This can reveal one's sex and ethnic background, and give a pretty good idea of one's hair color, eye color and even skin color. It can also hint at more personal things, such as whether one is a risk-taker, an early bird or have a behavioral disorder.
