A Turing machine that simulates another Turing machine/input pair that has been encoded as a string.
The concept is fundamental to state several key results in computer science, notably the halting problem.
Suwu herding sheep played by Song Fei (2017)
Source. 
This is where they moved the Chicago Pile-1 after they decided it might be a bad idea to run highly experimental nuclear reactions right in the middle of one of the most populous cities of the United States.
So more precisely, it is a continuation of the Metallurgical Laboratory.
Ciro Santilli maintains that they chose the site because the name is so cool. Wikipedia says it is derived from the Forest of Argonne, maybe it even shared etymology with the element argon.
Stringless guqin fan painting by Feng Chaoran (1943)
Stolen traight from www.silkqin.com/10ideo.htm on silkqin.com:Wind in the pines and a babbling brook are nature's melody. A qin was brought along, but there is no need to play it
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