Dr. Cabrera's Carved Stone. Carved rocks that have been dated to around 2000 years old. Rocks with carvings that depict extraordinarily advanced medical procedures like heart transplants. Rocks that show a very advanced society from two thousand years ago.
'Ghost heart,' a framework for growing new human hearts using a protein scaffold and stem cells, could be an answer for thousands waiting for new hearts. This experimental method could also apply to other organs.