Invisibility

So often I feel invisible, and it turns out I am.  When he discusses our cells, if you look closely at our atoms and electrons, there is nothing visible.

I offer the theory that scientists know more about this than they tell us.  Did you see the video of the guy climbing in the tank?

http://youtu.be/8EUy_82IChY

If you are not in a thoughtful mood, don't bother watching this.