One of the greatest questions known to man. There is no scientific proof that souls exist. The soul is defined as the spiritual or immaterial part of a human being or animal, regarded as immortal. This is interesting that animals are now included in the definition as having souls. Not so long ago in our recent past it was taught to us growing up that only humans have souls.
The idea of the soul is bound up with the idea of a future life and our belief in a continued existence after death. It's said to be the ultimate animating principle by which we think and feel, but isn't dependent on the body. Many infer its existence without scientific analysis or reflection. Indeed, the mysteries of birth and death, the play of consciousness during dreams (or after a few martinis), and even the commonest mental operations – such as imagination and memory – suggest the existence of a vital life force – an élan vital – that exists independent of the body.
Traditionally, science has dismissed the soul as an object of human belief, or reduced it to a psychological concept that shapes our cognition of the observable natural world. The terms "life" and "death" are thus nothing more than the common concepts of "biological life" and "biological death." The animating principle is simply the laws of chemistry and physics. You (and all the poets and philosophers that ever lived) are just dust orbiting the core of the Milky Way galaxy.
A new born human baby is nothing more than a blank self aware Artificial Intelligence framework in a biological skin. That framework is preprogrammed to become self aware and learn , interact and ultimately dominate it's environment.
In the near future when we create self aware robots. Will they be considered as having a soul? If the robots have emotions like us. They can love, hate etc. Then do we consider them as having souls? So a soul can be defined as every humans unique intelligence framework that allows us to interact with the world. Our biological structure eventually dies. Once dead there is no bringing back that biologial "soul". If the soul is that self aware spark. Then self aware robots should be considered as having "souls" also.
But a digital representation of us can be imortal. It will then be a simple matter to put the software into a physical body. Then what was once dead could be brought back to life again.
What seperates us from animals? What makes us special and unique with regards to having a soul? Nothing.