When I was reading in the forum yesterday, there was a link to http://www.cracked.com/article_18828_the-creepy-scientific-explanation-behind-ghost-sightings.html
I already knew that infrasound ist the cause of fear and many paranormal experiences like Tandys apparitions. However, I didn´t know that tigers make infrasound. Could that be the explanation why apparently harmless infrasound scares many people and lets some of them think there was a beiing that really isn´t there? Could the real danger of real predators making infrasound in the Stone Age be the reason why many people are afraid when they notice infrasound though there is nothing dangerous to see or hear? A biological heritage?
Or often, when someone is alone in a very dark room (for example a testperson in a psychological test or a little child at home), he often thinks to see red eyes or to hear breathing. Maybe this is also a vestige of the times when people were never safe before enemies and dangerous animals, so that they better believed in a lion hidden in a bush und ready to eat them than think that all was well? Especially in the night, where humans are so much more helpless than most animals?
And if someone wakes up in the night and mistakes the expanding and shrinking wood for human steps and thinks that it must be a ghost because nobody else is in the house - could it be possible that the brain instinctivly looks out if there is no enemy when one wakes up, because in the Stone Age there might have been? And - to be on the safe side - interprets harmless noises as dangerous?
Any other examples?