The advances in 3D printing and stem cell activation for body replacement parts and possible enhancement are extraordinary. Ethicist are having a field day.

"This is so amazing", said the person with increasing arthritis pain of the knee. Knee replacement just sucks, according to not only people who've had it, but doctors who do it. It's so crummy that most doctors won't do it until you just absolutely flat out can't move around - because then the replacement is better.

I see news items like this about twice per week now. This really is the era for regenerative medicine.