Question: Is there any scientific explanation behind ghosts?

Matt Carnie answered on 24 Jun 2013:

There is! There is some research on infra-sound. This very low frequency sound waves. Research shows that this type of sound (which can’t be heard by humans) can cause people to feel uneasy, to feel like they are being watched and cause them to see things which aren’t there! Spooky! When haunted places are investigated, there is often evidence of infra-sound waves – giving a scientific explanation to the cause. The cause of the infra-sound is often things like faulty machines or drafts down long (probably dark!) corridors.

Ghost have never been proven to be supernatural and there is often a sound explanation of a “haunting”. Often the most reasonable explanation behind ghost sightings is that the human mind often plays tricks on us!

If you want to read more about the infra-sound stuff. Here is a nice paper where the source of “haunting” was discovered scientifically: http://www.hauntmastersclub.com/wp-content/uploads/sites/1/files/ghost-in-machine.pdf