Following the popularity of our optical illusions lists (20 Amazing Optical Illusions, and Another 10 Amazing Optical Illusions), we have put together an amazing array of sound illusions (auditory illusions). In these illusions, your mind is tricked in to thinking it is hearing something when, in fact, it is not. To get the most out of this list you should have a set of stereo headphones and a stereo sound system. Unless otherwise noted (before each audio file), you should listen to these sounds with your stereo. Laptop speakers are not suitable for most of these illusions.

This illusion was discovered by Diana Deutsch, and is an example of our brains “grouping” similar notes together. Two major scales are played: one ascending, one descending. However, the notes alternate from ear to ear – for instance, the right ear hears the first note of one scale, and then the second note of the other.

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The mind is a wonderful thing - there is so much about it which remains a mystery to this day. Science is able to describe strange phenomena, but can not account for their origins. While most of us are familiar with one or two on this list, many others are mostly unknown outside of the psychological realm. This is a list of the top ten strange mental phenomena.

We have all some experience of a feeling, that comes over us occasionally, of what we are saying and doing having been said and done before, in a remote time – of our having been surrounded, dim ages ago, by the same faces, objects, and circumstances – of our knowing perfectly what will be said next, as if we suddenly remember it! – Charles Dickens

Déjà vu is the experience of being certain that you have experienced or seen a new situation previously - you feel as though the event has already happened or is repeating itself. The experience is usually accompanied by a strong sense of familiarity and a sense of eeriness, strangeness, or weirdness. The “previous” experience is usually attributed to a dream, but sometimes there is a firm sense that it has truly occurred in the past.

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[WARNING: Items on this list contain language that may offend] This list follows on from our previous 10 Great Parodies list. The clips here are all hilarious and even though some may be stretching the term parody to be included, they are all great. Enjoy!

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We all love to get frightened from time to time and as a result, some of the earliest films made were horror movies. You can be certain that every year Hollywood will bring out some new form of terror to shock us in the theaters. Sometimes they achieve their goal - other times we are left with a pile of junk. With this post we are going to uncover the best horror movie of all time.

When you give us your view, try to tell us why you have chosen the particular film, and also, as a secondary question, tell us what style of horror is best - for example, psychological horror (with little or no blood) or slasher films. Tell us why you think one is superior to the other.

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