A chimera is a hybrid of two species. In this case, scientists working on new possibilities for creating lab-grown organs for human transplants created early embryos that are half-human and half ...

After four failed attempts, scientists have at last dated the skeleton of a possible human-Neanderthal hybrid found in ...

Japan's government approved a request for stem-cell experiments meant to create an animal-human hybrid and allow it to be brought to term. The experiment, which still requires approval from the ...