Yair Reisner and his colleagues, writing in the Proceedings of the National Academy of Sciences, describe their bid to cure hemophilia A in mice by means of fetal pig spleen tissue transplantation.

“Pig’s thinkers, Davey ... addition of garlic vinegar as an “antidote” to a dish of grilled goat’s spleen. But offal exists in many less formidable forms, and it is high time to ...