Alien explorations article that has possible origins explanantion for the engineer head in the ampule room.

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Dec 23, 2016

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http://alienexplorations.blogspot.in/2012/08/prometheus-references-jack-kirbys.html

Interesting article that 
Might indicate that the 
Giant head may be a 
Being captured by the 
Engineers and used its 
Abilities to their own agenda possibly 
mind control.