From Earth:
Benjamina’s small cranium lay hidden in Spain’s Atapuerca Mountains for more than half a million years. Today her story challenges long‑held ideas about when human empathy first appeared.
Juan Luis Arsuaga of the Complutense University of Madrid, who directs the Sima de los Huesos excavations, says the child’s remains force scientists to rethink social life in the Middle Pleistocene.
Excavators cataloged Benjamina as Cranium 14, an almost complete neurocranium from a Homo heidelbergensis girl aged about ten to twelve.
Computed‑tomography measurements place her brain volume near 1,200 cm³, slightly smaller than that of many modern pre‑teens.
Early restoration revealed that the left limb of the back‑of‑head suture had fused before birth, a condition called lambdoid synostosis.
True fusion of this suture occurs in only two percent of craniosynostosis cases, making it the rarest form of the disorder.
Modern epidemiology puts overall craniosynostosis prevalence at roughly one in 2,000 births.
Because the fused bone cannot expand, pressure diverts growth toward the forehead and opposite side, creating the asymmetrical dome seen on Benjamina’s right parietal plate.(Read more.)
Share


No comments:
Post a Comment