Water is essential to life because it creates us humans, plants, animals, etc. So, if we find water on Mars it would be important because water is essential to life, meaning we would know that there would be some kind of life on Mars because water makes up anything.
The skin will get infected
Teratology. This is a field within embryology (study of development of embryo and fetuses) that studies the effect of congenital abnormalities on the developing embryo and also teratogens ( substances that affect the normal development of embryo/fetus)