It seems that everyone is trying to prove physically something that isn't physical, which doesn't really make sense. You people are crazy people!
So I will add my thoughts. The physical evidence of consciousness isn't something everyone agrees on. What about evidence for other metaphysical things? How about the Chinese concept of chi (spelt qi actually)?
I have a friend who is very into martial arts and accepts the concept of chi. At the very least, it's a helpful concept to use in the the field of martial arts. Then it gets interesting: the master of this martial art had what was called a dragon's pearl. This is the physical place where the chi in your body is naturally stored; it's called the dan tien and is an inch or two below your belly button. This man had a physical lump in his dan tien. It was as hard as rock and he could even move it around at will (to what extent, I'm not sure). This is where he stored his chi, and it showed.
It was my fortune to meet this man, who, as the designated master of his martial art, spends his life training. Lo and behold, he looked like he had a pot belly! He was incredibly musculed, though unusually so. There was no fat in him, yet he had this bulge of a 'dragons pearl'. It's the only physical thing I've seen to verify the existance of chi and I wish I could've explored it further (but that would've been rude
).
Still, it was a physical manifestation of a non-physical energy! Am I just crazy? Or are all of YOU people crazy people??