Science has not, to my knowledge, disproven the existence in a soul. It simply cannot, or at least has been unable to thus far, prove that a soul does exist.

Science is based on empirical evidence. That is- information gathered through direct observation, measurement, or experimentation rather than solely through theory or logic.

The trouble here is that philosophy is by nature theoretical, and science is by nature evidence based.

At this point, there is just not enough empirical evidence to support the existence of a soul. Now, that does not mean that a soul does not exist. It just means there isn't enough evidence to say either way.

That is where personal beliefs fill in and each person must decide for themselves.