Hermione's smile faltered. "I suppose," she offered, though she didn't suppose so at all. Eye color and facial structure was all a matter of genetics, which was a branch of science. She supposed, if she really thought about it, the odds of two people coming together to make a person who looked just so would be considered something special, and recreating the conditions of the womb isn't yet something science has quite perfected in her world, so that does lead the entire reproductive cycle to be known as the "miracle" of life by some.

Still, she'd rather not get into all of that with a stranger, and so she only asks, "Do they have the study of genetics in your world? It would explain a lot about why some people have one eye color and others another. I'd teach you some of it myself, but there's no telling if things work the same way where you're from as where I'm from. I wouldn't want to give you false information."