Spent time with a martial arts expert who could effectively see while blindfolded. He claimed to be able to sense peoples energy and taught others how to do it as well. He was able to proove all of this, he let me check his blindfolds and use other blindfolds and be across multiple rooms in buildings of my choosing. He had me convinced and I was really trying not to buy it. He said its not supernatural just not codified and was able to teach me the basics of how to develop it. I didnt stick around long enough to get to his level but Im convinced that human perception is not necessarily limited to 5 senses. I dont know if thats what you mean by supernatural though.