The world is full of wonders and mysteries. How much do we not know from what happened in the past? Most definitely more than we do know. Being a historian or actually any scientist means you have to interpret the evidence you collect in your investigation. It might be that they’re right or that their interpretation is off, or that they can’t even come up with an interpretation.
There are so many unsolved murder cases, gaps in history books or just weird occurrences that don’t have an explanation. And it might very well be that we will not find one. We gathered some of the biggest mysteries people on Reddit think will remain secrets forever from a thread started by Apart-Scale who asked “What historical mystery is unlikely to ever be solved?”
Do you have hope that these secrets might be revealed? Let us know in the comments and if you know of any other mysteries in mind that don’t let you sleep at night, we would really like to hear them.
More info: Reddit
#1 What Works Were Lost From The Library Of Alexandria

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#2 I Want It To Be Solved But It's Seemingly More And More Unlikely Each Day: D. B. Cooper

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#3 What Happened To The Isabella Stewart Gardner Museum Paintings

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#4 What Pope Leo Said To Attila The Hun

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#5 The Vatican Library

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#6 Who Turned In Ann Frank (If Anyone)

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#7 The Meaning Of The Text In The Voynich Manuscript

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#8 Whether Frank Morris, John Anglin, And His Brother Clarence Anglin Survived Their Escape From Alcatraz Federal Prison

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#9 Who Has In Their Possession The Ark Of The Covenant?

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#10 What Caused The Bronze Age Collapse

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#11 What Was Going On Before The Big Bang

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#12 Where The Sumerians Came From

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#13 The Great Unconformity. 1.5 Billion Years Of The Geological Record Just Sorta "Gone"

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#14 The Wow Signal From Outer Space

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#15 The Guy In A Max Headroom Mask That Hijacked A Doctor Who Broadcast In I Believe Chicago In The 80s, To This Day No On Knows Who It Is

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#16 The Missing Irish Crown Jewelry

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#17 What The Origin Of Language Was Like

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#18 The Indus Valley Script
The Indus script or the Harappan script is what scientists think to be a text made of symbols produced by the Indus Valley Civilization that flourished from about 2600 BC to 1900 BC. The symbols depict human and animal motifs but they haven’t been deciphered. Linguists can’t even agree on what kind of language it is and it doesn’t seem to have connections with other languages that were used in the surrounding areas. There are about 400 symbols, so at least they agree that they don’t represent phonograms and instead syllables. The script could possibly tell us more about the Indus Valley Civilization as we have the least information about it among the biggest ancient civilizations and most probably not being able to read the script is one of the main reasons why.
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