Once upon a time there was a physician who had the help of "death". He was given a magical herb by the death and if the death is seen near patients head he was to give a tiny amount of the herb to the patient and the patient will be cured. If the death is near patients feet it is time to die. His fame spread throughout the country and reached the king as well. Oneday when the king was sick  he summoned this physician. Physician saw death at kings feet and he immediately ordered to position king the opposite way and treated king with the herb. Death was not pleased with this cheating and he make the physician promise that he will not do it again. However he did the same for king's daughter which lead to his own death. This is a famous German folk tale by Grimm bothers. The idea of immortality has been fascinating us humans for thousands of years and we are doing everything we can to expand our lifespans to the maximum and yet, even in the 21st century we have a handful ...