Some phenomena science difficult to explain, really exist?

Some phenomena difficult to explain the science, really respect it.

Difficult to explain is not necessarily ghosts and gods, may be the current scientific ability is not enough.

In many reports, I myself have read many hard to explain the existence of science, there are obviously witnesses, but there is not enough evidence to prove that at this time we should believe that witnesses or should believe that where the evidence. Let's see how many we are not yet able to explain

A: The sixth sense

"Sixth Sense" I believe many people call this as an intuition, perhaps different regions have different terms to that. The so-called intuition is that we sometimes seem to experience the moment of a thing happening. Scientists think intuition is that we subconsciously collect some information that helps us to predict what is going to happen. We do not know at all what these facts are and do not know why we feel it. In psychology can only give some explanation of the phenomenon, can not explain the mystery.
What is "intuition" in the end? Is it really the mysterious force that has nothing to do with reason? If so, how to explain it can help us make better choices? When should we trust intuition? We all find it hard to explain all this.

Two: bizarre speech before death

In China, there is a saying that "people die and say good," saying that when people are going to die, they say they are full of goodwill, and I can understand that after all, people are about to leave the world, but I can always listen Before I say someone is about to die, say "I saw my lover wearing white clothes right in front of me." "I saw the entrance to paradise, and the souls of some friends."
Here I can not help but think, in the end is a human illusion, or people can see that I can not see before leaving. Does human soul exist?

Three: heart placebo

The comfort in my heart is far more powerful than any medicine invented today, and there have been many reports online. No, there are many examples in our reality. For example, you may have a very serious illness, but the doctors around you say more about your body No problem, then the more you suffer from the disease, it is a psychological comfort, and even some because of a positive attitude was well.
This self-healing ability of human beings is amazing.

Maybe you have encountered some difficult to explain the phenomenon, we can discuss together
I came to China, my English ability is not very good.