The idea that human beings have souls that leave their body after death is an essential part of most religions and spiritual beliefs. However, this has been very difficult to prove scientifically. Benjamin Scherlag, Ronald Scherlag, Tarun Dasari and Sunny Po at the University of Oklahoma Health Science Centre recently investigated the existence of a soul by conducting a series of scientific studies. They carried out these experiments on a dwarf form of the organism Stentor coeruleus, which is known for its regenerative abilities.