To add another log to the fire, the theory that the skulls were simply the result of deliberate malformation due to manipulation of the soft skulls of children, we should factor in this information:
They have found elongated skulls in fetuses which are in utero state in female mummys.
http://www.ancient-origins.net/unexplained-phenomena/elongated-skulls-utero-farewell-artificial-cranial-deformation-paradigm-002526?page=0%2C1
The “opposite” of zika skulls?
Ya might have it ... did they have normal human skull sutures or are they minus the one like the Cone Head Skulls?
Then again ... My middle daughter was a large baby and my poor Wife in labor for many hours, finally decided to do a “C” Section, later I am Dad looking at my baby with all the other Dads through the glass at my baby with the pointed head and ears that looked folded. Her pointed head went away with her folded ears.
(Like I told her , she was like a Butterfly, she transformed into the beautiful woman she is today)