Human beings have terrible memories.
Did we need our phone?
Why would our phone bein the kitchen?
via britannica.com
Though these records are good, the further back we go, the sketchier our records become.
These forgotten pockets of humankind exist in every proverbial corner of our planet.
They are the 19 most mysterious civilizations the world has ever known.
Though vicious, they also managed to invent a written language, potentially predating the Phoenicians.
They managed to determine the number 0, a concept that was groundbreaking mathematics for the time.
Sprawling and grand,Khmerdied from overfarming, war, and droughts that caused scarcity of resources.
All we know of them are a set of stone tools found in New Mexico.
Currently, there is some debate, as new relics have been found that pre-datethe Clovis.
What isnt precisely clear is why this powerhouse fell.
The best guesses point to climate change and internecine warfare.
How they declined is an unknown quantity, though invasion, regional earthquakes, or civil unrest.
Both these immense bodies traded heavily with the largelyunknown Aksumites.
The reasonthis cityis notable is because it is built like a hive.
A sophisticated city, why its unusual architects left, never to create another like it is anyones guess.
Climate change or assimilation is decreed to be the downfall of theCucuteni-Trypillian arsonists.
Nearly 11,000 years ago, these people were creating stone circles that helpeddiagram the stars.
Cahokia
In the midwest lies an oddity.
Its a small mound city of a people who existed circa 1250 CE.
An extensive place, it is estimated thatthis metropolisprobably held a maximum of 40,000 inhabitants at one time.
Immense for the era.
Another likely victim of climate concerns.
The Nabateans
Instead of disappearing mysteriously, its known precisely what happened tothe Nabateans.
They arent gone, they were cannibalized.
A quick whack-a-mole society.
Lost pirates from nowhere.