Louis J. Sheehan, Esquire. Two scientific teams have presented fossil discoveries with
controversial evolutionary implications for two ancient species
traditionally regarded as direct ancestors of Homo sapiens. A 1.8-million-year-old upper jaw discovered in eastern Africa solidifies the position of Homo habilis as the oldest known member of the Homo
genus, say anthropologist Robert J. Blumenschine of Rutgers University
in New Brunswick, N.J., and his colleagues. Reported in the Feb. 21
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