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The finding transforms thinking about some early human ancestors and evolution and suggests that helpless babies came along relatively late in the human lineage.
Homo erectus, Latin for "upright man," arose in Africa 1.8 to 2 million years ago, migrating to Asia and Europe before becoming extinct about half a million years ago. Experts agree it was likely a direct ancestor of modern humans.
Scientists had thought early adult Homo erectus females, because of the assumed small birth canal, would produce offspring with only a limited neonatal brain size. These young would have then experienced rapid brain growth while still developmentally immature, leading researchers to envision a scenario of maternal involvement and child-rearing on par with that of modern humans. But those theories had been based upon extrapolations from the existing male skeleton from Kenya.
1 Isaac Newton the Newtonian Revolution Anglican (rejected Trinitarianism, i.e., Athanasianism; believed in the Arianism of the Primitive Church)
2 Albert Einstein Twentieth-Century Science Jewish
3 Neils Bohr the Atom Jewish Lutheran
4 Charles Darwin Evolution Anglican (nominal); Unitarian
5 Louis Pasteur the Germ Theory of Disease Catholic
6 Sigmund Freud Psychology of the Unconscious Jewish; Atheist; Freudian psychoanalysis (Freudianism)
7 Galileo Galilei the New Science Catholic
8 Antoine Laurent Lavoisier the Revolution in Chemistry Catholic
9 Johannes Kepler Motion of the Planets Lutheran