"What is this thing you call a soul?"
I know you want a scientific evidence to this question.
You maybe not be aware of that but you're blindy following a philosophical system called Positivism.
Positivism says that the only valid knowledge is science. They deny any other philosophical insight. Some even deny psychology. But Positivism is absurd because they see science as a magical wand (existing by itself) and can't see that science itself is a philosophical system. Positivism is pure absurd.
The soul can't be a problem to science because science is the quest for material properties and the soul is immaterial. But we can find material interactions with the soul.
The soul is a problem of philosophy.
When you ask for scientific evidence to a philosophical problem you're following the Positivism.
Positivism is the base of modern Atheism too. When someone says he's an atheist because there's no scientific evidence for God, for example. That's a positivist atheist and that's why atheists are always trying to hijack science.
The problem of soul have a lot of debate in philosophy and one of the definitions of the soul is it doesn't have any parts but it's responsible for high mental functionalities.
The soul have functions without organs. So when you see evidence for the sense of beauty in human behaviour (like art) and does not find the exact part of the body that produces it you're seeing a function of the soul. The non instinctive memory is another function of the soul. In other words no matter how hard you try you would not find the 9th symphony in Beethoven's brain.
Cofty I'm not trying to offend you. I admire your love for science and I think you're very intelligent. I'm just trying to exchange some philosophical knowledge with you.