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Moroccan Fossils Dated to 773,000 Years May Sit Near Human Lineage's Root

Magnetostratigraphy tied to the MatuyamaBrunhes reversal pins the Casablanca assemblage to roughly 773,000 years ago.

Overview

  • An international team led by Jean-Jacques Hublin reports in Nature a well-dated hominin assemblage from the Grotte à Hominidés near Casablanca.
  • The fossils comprise a nearly complete adult lower jaw, an additional partial adult jaw, a child's jaw, several vertebrae, isolated teeth, and a femur marked by carnivore bites.
  • Micro-CT studies of dental structures identify similarities and differences with Homo antecessor, indicating related but distinct African and European populations.
  • The authors interpret the remains as strong candidates for populations near the last common ancestor of Homo sapiens, Neanderthals, and Denisovans.
  • The findings shift attention to northwest Africa as a key region for early Homo evolution and extend the timeline well beyond the oldest known Homo sapiens fossils.