Here is a random/interesting article about a sensory phenomenon that occurs across the world.

 

http://mic.com/articles/91091/a-mysterious-sound-is-driving-people-insane-and-nobody-knows-what-s-causing-it?utm_source=policymicFB&utm_medium=main&utm_campaign=social

One Comment

  1. Yuk Fai Leung says:

    Interesting!

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