Genetically, the X-Chromosome holds all the data for gender. The Y-Chromosome is tiny next to it, only telling the body to activate the male characteristics. Technically, all fetuses start out female. The thing is the body is not designed to undo changes to the body, nor is it designed to switch gen...

Aging is a biological process. The only reason people age is because it's in our DNA. Humans have an upward maximum age of about 120 years. We have extended our lifespan by altering our environment and medicine. We age slower now than we did a couple hundred years ago, and that's not saying the max ...