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In this top 15 list, we look at some audio files with mysterious backstories that remain unsolved. Some of these sounds are so scary, they'd be almost unbelievable if they weren't luckily caught on tape. Enjoy our analysis of these sound recordings and let us know your theories in the comments.

Written by: jessicaholom
Edited by: Huba Áron Csapó

Sources: https://pastebin.com/EiLuaBWX

Music:
"Day of Chaos" "The Escalation" "Evening of Chaos" "Echoes of Time" "Static Motion" "Ice Demon" "Hush Full Mix (Edited)"
Kevin MacLeod (incompetech.com)
Licensed under Creative Commons: By Attribution 3.0
http://creativecommons.org/licenses/by/3.0/