In an effort to tackle the organ donor shortage, researchers in the United States have successfully created part-human, part-pig embryos and implanted them into a sow. Eventually, these animals could act as incubators for human organs, which concerns some ethicists.
The U.S. National Institutes of Health has stopped funding experiments in which human stem cells are transplanted into the embryo of an animal. Now, a group of researchers from Stanford University are speaking out, claiming that the restrictions are holding back important medical research—and that the NIH’s reasons…
Last week at Buzzfeed News, Dan Vergano described the surprising results of a paternity test–the first known case of a man fathering the son of a brother he didn’t know existed. It’s an example of a rare genetic condition known as chimerism.