"I'm not exactly a physician, but I do know one, and I've studied the human body extensively, and I have a lot of medical papers available from my time." César figures all of those are useful. "Medicine's almost entirely unrecognizable, alchemy has involved into the study of chemistry, and in at least my world... astrology isn't really used at all."

He shrugs. "But not all Earths are like mine, so I won't dismiss it out of hand. The physical properties of each universe are different."