Here's a video of the mouse embryo, with a beating heart and all: http://www.theguardian.com/science/video/2014/jan/29/mouse-embryo-beating-heart-stap-cells-vid

Here's a video of the mouse embryo, with a beating heart and all: http://www.theguardian.com/science/video/2014/jan/29/mouse-embryo-beating-heart-stap-cells-video http://www.theguardian.com/science/video/2014/jan/29/mouse-e...