Maybe We're Not Infested With Aliens

Maybe the aliens are part of what makes us us.

- David Wallace-Wells

 

It is not only possible, it has in fact happened that a woman who vaginally conceived a child, then vaginally delivered her, had Protective Services threaten to take the child when a maternity test showed she was not, in fact, the mother. Nor was she the mother of her second child, genetically. Or her third, whom she was still carrying throughout the dispute with her estranged boyfriend—the man who, those same tests proved, was definitively the father. Only later did Lydia Fairchild discover that the true mother of all three of her children was her twin—if twin is really the word for one human embryo more or less swallowed by another before birth. The eggs that produced those babies had been with Fairchild her whole life, but genetically they belonged to an unborn sister, unknown to her and even her parents, living on in small parts inside her—a phenomenon that poetic scientists have called “parasitic” or “vanishing” twins. These days, they tend to prefer “chimerism,” after the mythic beast assembled, like Frankenstein’s monster, from multiple animals. But, man, isn’t that even creepier?