“They” say that time travelers would not survive, in either direction. We have no resistance to diseases that existed a thousand years ago, and people from the past would quickly succumb to the illnesses to which we have developed a natural resistance.
“They” say that time travelers would not survive, in either direction. We have no resistance to diseases that existed a thousand years ago, and people from the past would quickly succumb to the illnesses to which we have developed a natural resistance.