New scientific knowledge help the building of the Panama canal because there was a decrease of workers getting sick of malaria and yellow fever. It was Colonel Gorgas, the Chief Medical Officer, who have read about discoveries linking mosquitoes and malaria. Due to these readings, he succeed in eradicating the cause of the disease therefore a decrease in people getting sick.
The main reason why some archaeologists believe that women were the first farmers was because the men were almost always out hunting, leaving the women at home to farm.
The Republican Party stated that slavery would not be allowed to spread any further into the territories
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