From sailing stones to underwater noises these are 25 frustrating mysteries that were eventually solved.

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Finding Richard III
The source of the Nile River
Why the "atmosphere" of the sun is hotter than the surface of the sun
Finding the Titanic
Loch Ness monster
Troy
The fairy circles of the Namib Desert
The identity of Deep Throat
Egyptian hieroglyphs
The fate of Martin Bormann
Fish farts
The Bloop
Why corals pulsate
The fungus that caused the Irish potato famine
The direction in which the core of the Earth spins
Whether or not women blush in the dark
Germ theory
How many licks it takes to get to the center of a tootsie pop
The Antikythera mechanism
Stomach Ulcers
Chaocipher
The Roanoke Colony
Black bodies being unexplainable by classical physics
Sailing Stones