How far should we go to extend human life? For tens of thousands of years most societies have been using plants for medicinal purposes. Between 4,000 and 2,000 years ago the Ancient Egyptians, Babylonians and Greeks improved treatments and surgery based on observations of how the body worked. By the 20th century in Europe and the rise of modern medicine, great advancements in the attempt to preserve and extend human life had been achieved. The first human organ transplant was a kidney transplant performed in 1954 in the USA. Today in the UK there are over 7,000 people on the transplant waiting list. A few hundred people, in another attempt to challenge the boundaries of human life, have chosen to be frozen after their deaths. Their bodies wait in suspension until science has advanced to the point that they can be resuscitated and cured of whatever killed them.