Subject: Is it scientifically possible for ghosts to exist?

My reason for asking is because I am of a scientific mind, but when school 
returned 
from holidays my science teacher told the class a story of how she saw a ghost. 
This in itself is quite a paradox to me.  Is there any scientific possibility 
that ghosts can exist, with the idea of every living and non living object in 
this world exists because of 'energy', the difference between the solid and not 
so solid is because of the rate of vibration of this 'energy'.  So if you can 
enlighten me on this one I would very much appreciate it. Cheers Lisa

Re: Is it scientifically possible for ghosts to exist?