Synthetic mouse embryos have been created with beating hearts and brains. That is according to a paper released from Caltech & Cambridge University.

What does this mean? We are on the cusp of being able to create whole-body life from stem cells. It also has implications for humans. First will be the creation of replacement organs. The next obvious step is the creation of a human being.

Ethical questions will face the people working on these projects. Mac and Mike also discuss the ramifications of Artificial Intelligence.