26Superior canal dehiscence
Superior canal dehiscence is a disease that affects the inner ear and amplifies all internal sounds. It gets to the point where the sound of the eyeballs moving in their sockets sounds like “sandpaper on wood.”
27. Human ears can’t tell where low-frequency sounds come from. Therefore subwoofers can be hidden in home theaters or in trunks of cars.
28. The reason why we hate the recorded sound of our voice is that our skull changes the resonance of our voice from within and creates more bass. When we hear a digital recording of our voice, although slightly unfamiliar to ourselves, it’s exactly how other people hear it.
29. If you pour cold water into a person’s ear, their eyes will move in direction of the opposite ear, if you pour warm water into their ear, their eyes will move towards that ear. This is used to test for brain damage and is called ‘caloric stimulation’.
30. A man with a chronic ear infection cured himself with his own earwax. He was given a number of drugs by doctors, but nothing worked. In desperation, he took earwax from his good ear and placed it in his bad. Two days later he was fine.
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31Bare-knuckle boxing
There is a growing consensus that bare-knuckle boxing is safer than gloved boxing. The bones in the hand are considerably weaker than those in the skull, meaning the bare-knuckle fighter can’t punch with full force to the head.
32. When our inner voice speaks in our head, it is always accompanied by a subtle muscle movements from our larynx.
33. Before agriculture, human jaws were a perfect fit for human teeth. The emergence of agricultural practices initiated major changes to the jaw structure of ancient humans, leading to dental problems we still experience.
34. Approximately 1/3 of people have jaws that pop or click when they are opened all the way.
35. The human tongue is made of 8 different muscles, 4 of which (called the intrinsic muscles) are not even connected to a bone.
