At this time in the Neolithic, c. 7000-6,000 B.C.E., people were often buried under the floors of homes, and in some cases their skulls were removed and covered with plaster in order to create very life-like faces, complete with shells inset for eyes and paint to imitate hair and moustaches.
American factories were to produce goods to support the war effort and almost overnight the unemployment rate dropped to around 10%.
It encouraged them to rely on observation and experimentation to support their conclusions.
