Nature medicine has (or is about to, I can never really tell with Advanced online publishing) come out with the news that a group of scientists have made a breakthrough in regenerative heart medicine
What they have done (in simple terms) is take out the heart of a dead rat, removed all the cells, leaving this ghostly shadow of an organ, and then added a fresh batch of stem cells to the mix, thus creating (as if by magic) a new heart.
Tolman, “The Principles of Statistical Mechanics, Chapter 1, Part 1
3 weeks ago in The Curious Wavefunction