The researchers found that two babies were buried over 2,000 years ago in strange 'helmets' made of other children's skulls.
Researchers, led by research co-author Sara Juengst from the Anthropology Department of the University of North Carolina, have discovered the remains in a place called Salango in Ecuador and have recently published their findings in the Latin American Antiquity journal.
Scientists believe this is the only known case of children's skulls used as infant burial helmets, and they don't know what killed babies and children.
One infant's face "looked through the skull vault" – the space in which the brain is located – reports Live Science.
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The information desk reports that a "valance of the hand" was found between the child's head and the helmet, which is a type of hand bone.
Scientists apparently do not know whose hand was involved.
Archaeologists have also noted that it is likely that the skulls of children were wearing a body when they were turned into helmets, because helmets would probably not remain without the body.
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Juengst was joined by a colleague from UNC together with scientists from Yale University and Universidad Tecnica de Manabi, informing about these discoveries.