Looks like Einstein had a few tricks up his old sleeve.
Live Science writes:
Every night, amateur ghost-hunting groups across the country head out into abandoned warehouses, old buildings and cemeteries to look for ghosts. They often bring along electronic equipment that they believe helps them locate ghostly energy. Despite years of efforts by ghost hunters on TV and in real life, we still do not have good proof that ghosts are real. Many ghost hunters believe that strong support for the existence of ghosts can be found in modern physics. Specifically, that Albert Einstein, one of the greatest scientific minds of all time, offered a scientific basis for the reality of ghosts. A recent Google search turned up nearly 8 million results suggesting a link between ghosts and Einstein’s work covering the conservation of energy. This assertion is repeated by many top experts in the field. For example, ghost researcher John Kachuba, in his book “Ghosthunters” (2007, New Page Books), writes, “Einstein proved that all the energy of the universe is constant and that it can neither be created nor destroyed. … So what happens to that energy when we die? If it cannot be destroyed, it must then, according to Dr. Einstein, be transformed into another form of energy. What is that new energy? … Could we call that new creation a ghost?”
Read more at livescience.com