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Ngandong calottes from Java are the youngest H. erectus fossils at perhaps 27,000-50,000 years old.
Results from sequential study of two cohorts tested at three ages and at three different points in t
Growth of the body and brain is dramatic over the first 2 years.
School age (late childhood): 6–12 years, or to puberty.
Adolescence: 12 years or puberty to the beginning of adulthood.
Charlie Stone wants to retire in 30 years, and he wants to have an annuity of $1000 a year for ...