There is always Unexplained phenomena and our brain's ability to hide behind reason tends to shut it off from our realizing it.  Many of the unexplained phenomenon that occurs is just something we are not used to seeing.  Much of our everyday common functions are hardwired into our brain patterns leaving little room for open-minded new ideas.

Let me explain a little about what I mean.  It is a scientific fact that in order for your physical eye to perceive of the color red(for instance),  there must be an absolute absence of red for it to appear red to our eyes.  Basically,  a red rose is every single color except red.  That is a scientific fact.  The brain's natural ability to lie to us is continually tied to our reasoning functions.

One hundred years ago if I were to start explaining to people that soon there would be cell phones and people could talk to each other from thousands of miles away,  I would have been lucky not to have been locked up.  New Ideas must be presented in such a fashion as to not overwhelm the brain.  This is why much of what we now view as 'unexplained phenomona' is actually just what I like to call future facts.  

Reasoning is an act of the mind (the person behind the brain) and can become such an automatic process that it can cause some damage when trying to understand newer ideas.  Its like we become conditioned or programmed to accept only those things which conform to our current understanding of ideas.  I hope this makes sense?

Mother Nature has but one rule and one rule only, there is an exception to every rule.  Once you think you have her figured out she throws the proverbial curve ball at you.  This is why the progress of our academic sciences moves so slow.  At a snails pace.  We are so unaware of our own potential,  that we slow ourselves down by clinging too hard to what we already know.

Once upon a time it was considered impossible to know the fixed number of stars in our immediate galaxy,  now though,  its been done.  We are now in the process of taking little trips to the moon and back.  Soon these trips will be improved upon and we may eventually get off the planet.

Much of what was considered unexplained phenomena back in the way hey day,  we now know as completely normal everyday technology.  Basically,  every thing that is not easily explained today, I believe will be commonly known tomorrow.  Pleas keep in mind that it was once considered ridiculous that the world was round! Oh,  and lets not forget the Kantian Revolution our planet is NOT the center of the universe and we revolve around the sun not the other way round.